Nuveen Select Tax Free Income Portfolio 3 (NXR) NPORT-P Nuveen Select Tax-Free Income Portfolio 3 (Dec 2019 report)

NXR

Nuveen Select Tax-Free Income Portfolio 3

Portfolio of Investments    December 31, 2019

(Unaudited)

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	LONG-TERM INVESTMENTS – 97.0%
	MUNICIPAL BONDS – 97.0%
	Alabama – 0.6%
$1,170	Birmingham, Alabama, General Obligation Convertable Capital Appriciation Bonds, Series 2013A, 5.000%, 3/01/32	3/23 at 100.00	AA	$1,294,547
	Alaska – 1.2%
2,675	Northern Tobacco Securitization Corporation, Alaska, Tobacco Settlement Asset-Backed Bonds, Series 2006A, 5.000%, 6/01/32	1/20 at 100.00	B3	2,678,959
	Arizona – 0.1%
145	Maricopa County Industrial Development Authority, Arizona, Education Revenue Bonds, Paradise Schools Projects, Series 2016, 2.875%, 7/01/21, 144A	No Opt. Call	BB+	145,278
	California – 24.2%
12,500	Anaheim Public Financing Authority, California, Lease Revenue Bonds, Public Improvement Project, Series 1997C, 0.000%, 9/01/35 –  AGM Insured	No Opt. Call	AA	8,298,250
1,000	California County Tobacco Securitization Agency, Tobacco Settlement Asset-Backed Bonds, Los Angeles County Securitization Corporation, Series 2006A, 5.600%, 6/01/36	1/20 at 100.00	B2	1,007,770
1,095	California County Tobacco Securitization Agency, Tobacco Settlement Asset-Backed Bonds, Sonoma County Tobacco Securitization Corporation, Series 2005, 5.000%, 6/01/26	1/20 at 100.00	BB+	1,098,186
105	California Statewide Financing Authority, Tobacco Settlement Asset-Backed Bonds, Pooled Tobacco Securitization Program, Series 2002A, 5.625%, 5/01/29	1/20 at 100.00	Baa1	105,773
2,275	Folsom Cordova Unified School District, Sacramento County, California, General Obligation Bonds, School Facilities Improvement District 4, Series 2007A, 0.000%, 10/01/28 –  NPFG Insured	No Opt. Call	AA-	1,919,463
3,370	Golden State Tobacco Securitization Corporation, California, Enhanced Tobacco Settlement Asset-Backed Revenue Bonds, Series 2005A, 0.000%, 6/01/28 –  AMBAC Insured	No Opt. Call	Aa3	2,884,147
4,055	Kern Community College District, California, General Obligation Bonds, Series 2003A, 0.000%, 3/01/28 –  FGIC Insured	No Opt. Call	Aa2	3,457,739
1,160	Mount San Antonio Community College District, Los Angeles County, California, General Obligation Bonds, Election of 2008, Series 2013A, 0.000%, 8/01/43 (4)	8/35 at 100.00	Aa1	1,156,323
11,985	Norwalk La Mirada Unified School District, Los Angeles County, California, General Obligation Bonds, Election of 2002, Series 2007C, 0.000%, 8/01/32 –  AGM Insured	No Opt. Call	AA	8,942,128
3,000	Palomar Pomerado Health, California, General Obligation Bonds, Capital Appreciation, Election of 2004, Series 2007A, 0.000%, 8/01/25 –  NPFG Insured	No Opt. Call	A2	2,695,410
8,040	Placentia-Yorba Linda Unified School District, Orange County, California, Certificates of Participation, Series 2006, 0.000%, 10/01/34 (ETM)	No Opt. Call	A+ (5)	5,986,745
1,500	Placer Union High School District, Placer County, California, General Obligation Bonds, Series 2004C, 0.000%, 8/01/32 –  AGM Insured	No Opt. Call	AA	1,131,750

1

NXR	Nuveen Select Tax-Free Income Portfolio 3 (continued)
	Portfolio of Investments December 31, 2019
	(Unaudited)

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	California (continued)
$8,000	Poway Unified School District, San Diego County, California, General Obligation Bonds, School Facilities Improvement District 2007-1, Election 2008 Series 2009A, 0.000%, 8/01/32	No Opt. Call	AA-	$6,021,040
3,940	Rancho Mirage Redevelopment Agency, California, Tax Allocation Bonds, Combined Whitewater and 1984 Project Areas, Series 2003A, 0.000%, 4/01/35 –  NPFG Insured	No Opt. Call	A+	2,639,091
765	San Diego Association of Governments, California, South Bay Expressway Toll Revenue Bonds, First Senior Lien Series 2017A, 5.000%, 7/01/42	7/27 at 100.00	A	914,986
535	San Diego County Regional Airport Authority, California, Airport Revenue Bonds, Subordinate Series 2019B, 5.000%, 7/01/38 (AMT)	7/29 at 100.00	A+	657,708
2,525	San Francisco City and County Public Utilities Commission, California, Water Revenue Bonds, Non-WSIP, Series 2017A, 5.000%, 11/01/42	11/24 at 100.00	Aa2	2,937,610
65,850	Total California			51,854,119
	Colorado – 4.3%
500	Centerra Metropolitan District 1, Loveland, Colorado, Special Revenue Bonds, Refunding & Improvement Series 2017, 5.000%, 12/01/22, 144A	No Opt. Call	N/R	533,860
790	Colorado School of Mines Board of Trustees, Golden, Colorado, Institutional Enterprise Revenue Bonds, Series 2017B, 5.000%, 12/01/47	12/27 at 100.00	A+	938,101
1,935	Denver City and County, Colorado, Airport System Revenue Bonds, Subordinate Lien Series 2013B, 5.000%, 11/15/43	11/23 at 100.00	A+	2,170,935
1,295	E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%, 9/01/32 –  NPFG Insured	No Opt. Call	A	933,035
5,520	E-470 Public Highway Authority, Colorado, Toll Revenue Bonds, Series 2004B, 0.000%, 9/01/28 –  NPFG Insured	9/20 at 63.99	A	3,493,442
1,000	Park Creek Metropolitan District, Colorado, Senior Limited Property Tax Supported Revenue Bonds, Refunding Series 2015A, 5.000%, 12/01/33	12/25 at 100.00	A	1,158,660
11,040	Total Colorado			9,228,033
	Connecticut – 3.7%
2,290	Connecticut State, General Obligation Bonds, Refunding Series 2012E, 5.000%, 9/15/32	9/22 at 100.00	A1	2,482,978
1,500	Connecticut State, General Obligation Bonds, Refunding Series 2018C, 5.000%, 6/15/26	No Opt. Call	A1	1,818,960
1,750	Connecticut State, General Obligation Bonds, Series 2012B, 5.000%, 4/15/21	No Opt. Call	A1	1,835,557
1,615	Connecticut State, Special Tax Obligation Bonds, Transportation Infrastructure Purposes Series 2013A, 5.000%, 10/01/30	10/23 at 100.00	A+	1,816,391
7,155	Total Connecticut			7,953,886
	Florida – 1.3%
390	Greater Orlando Aviation Authority, Florida, Orlando Airport Facilities Revenue Bonds, Priority Subordinated Series 2017, 5.000%, 10/01/47 (AMT)	10/27 at 100.00	A+	455,423
2,000	Miami-Dade County, Florida, Aviation Revenue Bonds, Refunding Series 2019A, 5.000%, 10/01/49 (AMT)	10/29 at 100.00	A	2,409,060
2,390	Total Florida			2,864,483
	Georgia – 0.5%
1,035	Brookhaven Development Authority, Georgia, Revenue Bonds, Children's Healthcare of Atlanta, Inc Project, Series 2019A, 4.000%, 7/01/44	7/29 at 100.00	AA+	1,159,479

2

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	Guam – 1.6%
$1,250	Government of Guam, Business Privilege Tax Bonds, Refunding Series 2015D, 5.000%, 11/15/39	11/25 at 100.00	BB	$1,384,588
2,000	Government of Guam, Hotel Occupancy Tax Revenue Bonds, Series 2011A, 6.125%, 11/01/31	5/21 at 100.00	BB	2,110,520
3,250	Total Guam			3,495,108
	Idaho – 1.5%
3,000	Idaho Health Facilities Authority, Revenue Bonds, Saint Luke's Health System Project, Series 2014A, 5.000%, 3/01/44	3/24 at 100.00	A-	3,288,570
	Illinois – 9.7%
575	Chicago Board of Education, Illinois, Dedicated Capital Improvement Tax Revenue Bonds, Series 2016, 6.000%, 4/01/46	4/27 at 100.00	A	686,050
295	Chicago Board of Education, Illinois, General Obligation Bonds, Dedicated Revenues, Refunding Series 2017C, 5.000%, 12/01/30	12/27 at 100.00	BB	340,861
3,900	Chicago Board of Education, Illinois, General Obligation Bonds, Series 1999A, 0.000%, 12/01/28 –  FGIC Insured	No Opt. Call	Baa2	3,050,892
870	Chicago, Illinois, General Obligation Bonds, Project & Refunding Series 2006A, 4.625%, 1/01/31 –  AGM Insured	1/20 at 100.00	AA	871,966
260	Illinois Finance Authority, Revenue Bonds, Rehabilitation Institute of Chicago, Series 2013A, 6.000%, 7/01/43	7/23 at 100.00	A-	291,374
955	Illinois Health Facilities Authority, Revenue Bonds, Evangelical Hospitals Corporation, Series 1992C, 6.250%, 4/15/22 (ETM)	3/20 at 100.00	N/R (5)	1,016,225
2,190	Illinois State, General Obligation Bonds, Refunding Series 2012, 5.000%, 8/01/23	No Opt. Call	BBB	2,402,365
1,000	Kankakee & Will Counties Community Unit School District 5, Illinois, General Obligation Bonds, Series 2006, 0.000%, 5/01/23 –  AGM Insured	No Opt. Call	Aa3	946,440
	Metropolitan Pier and Exposition Authority, Illinois, Revenue Bonds, McCormick Place Expansion Project, Series 2002A:
2,500	0.000%, 12/15/30 –  NPFG Insured	No Opt. Call	BBB	1,815,475
4,775	0.000%, 12/15/31 –  NPFG Insured	No Opt. Call	BBB	3,335,958
5,000	0.000%, 12/15/36 –  NPFG Insured	No Opt. Call	BBB	2,864,950
2,000	0.000%, 6/15/37 –  NPFG Insured	No Opt. Call	BBB	1,122,060
1,400	Springfield, Illinois, Electric Revenue Bonds, Senior Lien Series 2015, 5.000%, 3/01/28	3/25 at 100.00	A	1,623,426
310	University of Illinois, Health Services Facilities System Revenue Bonds, Series 2013, 6.000%, 10/01/42	10/23 at 100.00	A-	349,931
26,030	Total Illinois			20,717,973
	Indiana – 1.1%
1,250	Indiana Finance Authority, Wastewater Utility Revenue Bonds, CWA Authority Project, Series 2015A, 5.000%, 10/01/45	10/24 at 100.00	AA	1,422,475
1,000	Zionsville Community Schools Building Corporation, Indiana, First Mortgage Bonds, Series 2005Z, 0.000%, 7/15/28 –  AGM Insured	No Opt. Call	AA	848,960
2,250	Total Indiana			2,271,435

3

NXR	Nuveen Select Tax-Free Income Portfolio 3 (continued)
	Portfolio of Investments December 31, 2019
	(Unaudited)

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	Iowa – 1.1%
$570	Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company Project, Series 2016, 5.875%, 12/01/26, 144A	1/20 at 104.00	B+	$593,746
660	Iowa Finance Authority, Iowa, Midwestern Disaster Area Revenue Bonds, Iowa Fertilizer Company Project, Series 2018B, 5.250%, 12/01/50 (Mandatory Put 12/01/37)	12/22 at 105.00	B+	726,013
950	Iowa Tobacco Settlement Authority, Tobacco Asset-Backed Revenue Bonds, Series 2005B, 5.600%, 6/01/34	1/20 at 100.00	B-	951,273
2,180	Total Iowa			2,271,032
	Massachusetts – 6.9%
2,230	Massachusetts Development Finance Agency, Revenue Bonds, Boston University, Series 2016BB-1, 5.000%, 10/01/46	10/26 at 100.00	AA-	2,632,337
1,000	Massachusetts Development Finance Agency, Revenue Bonds, CareGroup Issue, Refunding Series 2016-I, 5.000%, 7/01/21	No Opt. Call	A	1,056,580
1,300	Massachusetts Development Finance Agency, Revenue Bonds, Olin College, Series 2013E, 5.000%, 11/01/43	11/23 at 100.00	A+	1,445,522
2,250	Massachusetts Development Finance Agency, Revenue Bonds, Partners HealthCare System, Series 2014M-4, 5.000%, 7/01/44	7/23 at 100.00	AA-	2,483,482
2,180	Massachusetts Water Resources Authority, General Revenue Bonds, Refunding Green Series 2016C, 5.000%, 8/01/40	8/26 at 100.00	AA+	2,601,983
1,950	Massachusetts Water Resources Authority, General Revenue Bonds, Refunding Series 2011C, 5.250%, 8/01/42 (Pre-refunded 8/01/21)	8/21 at 100.00	AA+ (5)	2,076,536
1,000	Newburyport, Massachusetts, General Obligation Bonds, Municipal Purpose Loan, Refunding Series 2013, 4.000%, 1/15/30	1/23 at 100.00	AAA	1,080,810
1,165	University of Massachusetts Building Authority, Project Revenue Bonds, Senior Series 2014-1, 5.000%, 11/01/39	11/24 at 100.00	Aa2	1,343,396
13,075	Total Massachusetts			14,720,646
	Michigan – 1.3%
355	Detroit Water and Sewerage Department, Michigan, Sewage Disposal System Revenue Bonds, Refunding Senior Lien Series 2012A, 5.250%, 7/01/39	7/22 at 100.00	A+	383,460
2,000	Michigan State Building Authority, Revenue Bonds, Facilities Program, Refunding Series 2016-I, 5.000%, 4/15/35	10/26 at 100.00	Aa2	2,394,500
2,355	Total Michigan			2,777,960
	Nebraska – 1.7%
250	Madison County Hospital Authority 1, Nebraska, Hospital Revenue Bonds, Faith Regional Health Services Project, Series 2018, 5.000%, 7/01/26	7/25 at 100.00	BBB	290,840
2,600	Nebraska Public Power District, General Revenue Bonds, Series 2015A-2, 5.000%, 1/01/40	1/22 at 100.00	A+	2,765,464
500	Platte County School District 001, Columbus Public Schools, Nebraska, General Obligation Bonds, School Building Series 2014, 5.000%, 12/15/39	6/24 at 100.00	Aa2	571,625
3,350	Total Nebraska			3,627,929
	Nevada – 0.2%
445	Carson City, Nevada, Hospital Revenue Bonds, Carson Tahoe Regional Healthcare Project, Series 2017A, 5.000%, 9/01/37	9/27 at 100.00	A-	521,051

4

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	New Hampshire – 0.5%
$1,000	New Hampshire Business Finance Authority, Solid Waste Disposal Revenue Bonds, Waste Management Inc Project, Series 2003, 3.125%, 8/01/24 (AMT)	No Opt. Call	A-	$1,053,730
	New Jersey – 2.9%
1,850	New Jersey Economic Development Authority, Sublease Revenue Bonds, New Jersey Transit Corporation Projects, Refunding Series 2017B, 5.000%, 11/01/23	No Opt. Call	A-	2,080,769
305	New Jersey Health Care Facilities Financing Authority, Revenue Bonds, University Hospital Issue, Refunding Series 2015A, 5.000%, 7/01/28 –  AGM Insured	7/25 at 100.00	AA	353,501
4,900	New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Refunding Series 2006C, 0.000%, 12/15/28 –  AMBAC Insured	No Opt. Call	A-	3,892,903
7,055	Total New Jersey			6,327,173
	New Mexico – 0.5%
1,000	New Mexico Mortgage Finance Authority, Multifamily Housing Revenue Bonds, St Anthony, Series 2007A, 5.250%, 9/01/42 (AMT)	1/20 at 100.00	N/R	1,001,180
	New York – 1.5%
1,250	Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Refunding Series 2012F, 5.000%, 11/15/26	11/22 at 100.00	AA-	1,379,900
1,260	New York City Municipal Water Finance Authority, New York, Water and Sewer System Second General Resolution Revenue Bonds, Fiscal 2015 Series HH, 5.000%, 6/15/37	6/25 at 100.00	AA+	1,476,984
265	Port Authority of New York and New Jersey, Special Project Bonds, JFK International Air Terminal LLC Project, Eigth Series 2010, 6.000%, 12/01/42	12/20 at 100.00	BBB+	275,836
2,775	Total New York			3,132,720
	Ohio – 4.4%
1,465	Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue Bonds, Senior Lien, Series 2007A-2, 6.000%, 6/01/42	1/20 at 100.00	B-	1,474,054
3,720	Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue Bonds, Senior Lien, Series 2007A-3, 6.250%, 6/01/37	6/22 at 100.00	CCC+	3,839,709
1,500	Montgomery County, Ohio, Revenue Bonds, Miami Valley Hospital, Series 2011A, 5.750%, 11/15/21	11/20 at 100.00	A	1,551,210
1,475	Ohio Turnpike Commission, Turnpike Revenue Bonds, Infrastructure Project, Junior Lien Series 2013A-1, 5.000%, 2/15/48	2/23 at 100.00	Aa3	1,619,978
1,000	Ohio Water Development Authority, Pollution Control Revenue Refunding Bonds, FirstEnergy Nuclear Generating Corporation Project, Series 2005B, 4.000%, 1/01/34 (Mandatory Put 7/01/21) (6)	No Opt. Call	N/R	867,500
9,160	Total Ohio			9,352,451
	Oklahoma – 0.2%
345	Oklahoma Development Finance Authority, Health System Revenue Bonds, OU Medicine Project, Series 2018B, 5.000%, 8/15/38	8/28 at 100.00	Baa3	407,907
	Oregon – 1.5%
490	Clackamas County Hospital Facility Authority, Oregon, Senior Living Revenue Bonds, Willamette View Project, Series 2017A, 4.000%, 5/15/22	No Opt. Call	N/R	516,357
545	Oregon Facilities Authority, Revenue Bonds, Reed College, Series 2017A, 4.000%, 7/01/41	7/27 at 100.00	Aa2	607,969

5

NXR	Nuveen Select Tax-Free Income Portfolio 3 (continued)
	Portfolio of Investments December 31, 2019
	(Unaudited)

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	Oregon (continued)
$1,000	Oregon Facilities Authority, Revenue Bonds, Willamette University, Refunding Series 2016B, 5.000%, 10/01/40	10/26 at 100.00	A	$1,175,570
750	Washington and Clackamas Counties School District 23J Tigard-Tualatin, Oregon, General Obligation Bonds, Series 2017, 5.000%, 6/15/30	6/27 at 100.00	AA+	931,005
2,785	Total Oregon			3,230,901
	Pennsylvania – 4.7%
1,015	Delaware River Port Authority, New Jersey and Pennsylvania, Revenue Bonds, Series 2013, 5.000%, 1/01/37	1/24 at 100.00	A+	1,143,641
2,500	Pennsylvania Higher Educational Facilities Authority, Revenue Bonds, State System of Higher Education, Refunding Series 2016AT-1, 5.000%, 6/15/31	6/26 at 100.00	Aa3	2,965,950
	Pennsylvania Turnpike Commission, Motor License Fund-Enhanced Subordinate Special Revenue Bonds, Series 2010B-2:
370	5.000%, 12/01/30 (Pre-refunded 12/01/20)	12/20 at 100.00	N/R (5)	383,076
200	5.000%, 12/01/30 (Pre-refunded 12/01/20)	12/20 at 100.00	N/R (5)	207,068
430	5.000%, 12/01/30 (Pre-refunded 12/01/20)	12/20 at 100.00	A2 (5)	445,398
4,455	Philadelphia, Pennsylvania, Water and Wastewater Revenue Bonds, Series 2015A, 5.000%, 7/01/40	7/24 at 100.00	A+	5,011,073
8,970	Total Pennsylvania			10,156,206
	Puerto Rico – 1.3%
945	Puerto Rico Highway and Transportation Authority, Highway Revenue Bonds, Series 2007N, 5.250%, 7/01/31 –  AMBAC Insured	No Opt. Call	C	1,037,988
750	Puerto Rico Sales Tax Financing Corporation, Sales Tax Revenue Bonds, Restructured 2018A-1, 5.000%, 7/01/58	7/28 at 100.00	N/R	797,648
825	Puerto Rico Sales Tax Financing Corporation, Sales Tax Revenue Bonds, Taxable Restructured Cofina Project Series 2019A-2, 4.784%, 7/01/58	7/28 at 100.00	N/R	858,940
2,520	Total Puerto Rico			2,694,576
	South Carolina – 0.6%
1,270	South Carolina Transportation Infrastructure Bank, Revenue Bonds, Refunding Series 2015A, 2.900%, 10/01/25	10/24 at 100.00	Aa3	1,351,204
	South Dakota – 0.2%
400	South Dakota Health and Educational Facilities Authority, Revenue Bonds, Sanford Health, Series 2015, 5.000%, 11/01/35	11/25 at 100.00	A+	461,412
	Tennessee – 0.4%
795	Chattanooga Health, Educational and Housing Facility Board, Tennessee, Revenue Bonds, Catholic Health Initiatives, Series 2013A, 5.250%, 1/01/45 (Pre-refunded 1/01/23)	1/23 at 100.00	BBB+ (5)	889,677
	Texas – 9.3%
250	Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien Series 2011, 6.000%, 1/01/41 (Pre-refunded 1/01/21)	1/21 at 100.00	A- (5)	261,955
85	Central Texas Regional Mobility Authority, Revenue Bonds, Senior Lien, Series 2015A, 5.000%, 1/01/34	7/25 at 100.00	A-	98,824

6

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	Texas (continued)
$4,640	Grand Parkway Transportation Corporation, Texas, System Toll Revenue Bonds, Frst Tier Series 2013A, 5.500%, 4/01/53	10/23 at 100.00	A+	$5,191,835
	Harris County-Houston Sports Authority, Texas, Revenue Bonds, Junior Lien Series 2001H:
1,405	0.000%, 11/15/32 –  NPFG Insured	11/31 at 94.05	Baa2	935,070
2,510	0.000%, 11/15/36 –  NPFG Insured	11/31 at 73.51	Baa2	1,299,025
2,235	Harris County-Houston Sports Authority, Texas, Revenue Bonds, Third Lien Series 2004A-3, 0.000%, 11/15/32 –  NPFG Insured	11/24 at 62.71	Baa2	1,218,164
	Harris County-Houston Sports Authority, Texas, Special Revenue Bonds, Refunding Senior Lien Series 2001A:
3,045	0.000%, 11/15/34 –  NPFG Insured	11/30 at 78.27	AA	1,876,603
4,095	0.000%, 11/15/38 –  NPFG Insured	11/30 at 61.17	AA	1,957,738
2,255	Love Field Airport Modernization Corporation, Texas, Special Facilities Revenue Bonds, Southwest Airlines Company, Series 2010, 5.250%, 11/01/40	11/20 at 100.00	A3	2,322,966
125	Mission Economic Development Corporation, Texas, Revenue Bonds, Natgasoline Project, Senior Lien Series 2018, 4.625%, 10/01/31, 144A (AMT)	10/21 at 105.00	BB-	135,169
290	North Texas Tollway Authority, System Revenue Bonds, Refunding First Tier Capital Appreciation Series 2008I, 6.200%, 1/01/42 –  AGC Insured	1/25 at 100.00	AA	352,080
2,000	Texas Municipal Gas Acquisition and Supply Corporation III, Gas Supply Revenue Bonds, Series 2012, 5.000%, 12/15/32	12/22 at 100.00	A3	2,176,480
2,410	Texas Turnpike Authority, Central Texas Turnpike System Revenue Bonds, First Tier Series 2002A, 0.000%, 8/15/25 –  AMBAC Insured	No Opt. Call	A	2,181,532
25,345	Total Texas			20,007,441
	Virginia – 3.0%
3,500	Chesapeake, Virginia, Transportation System Senior Toll Road Revenue Bonds, Capital Appreciation Series 2012B, 0.000%, 7/15/32 (4)	7/28 at 100.00	BBB	3,525,935
765	Metropolitan Washington Airports Authority, Virginia, Dulles Toll Road Revenue Bonds, Dulles Metrorail & Capital improvement Projects, Refunding & Subordinate Lien Series 2019B, 4.000%, 10/01/44	10/29 at 100.00	A-	842,816
	Virginia Small Business Financing Authority, Senior Lien Revenue Bonds, Elizabeth River Crossing, Opco LLC Project, Series 2012:
410	6.000%, 1/01/37 (AMT)	7/22 at 100.00	BBB	451,927
1,510	5.500%, 1/01/42 (AMT)	7/22 at 100.00	BBB	1,637,202
6,185	Total Virginia			6,457,880
	Washington – 4.4%
205	Port of Seattle, Washington, Revenue Bonds, Intermediate Lien Series 2019, 5.000%, 4/01/44 (AMT)	4/29 at 100.00	AA-	245,196
1,600	Washington Health Care Facilities Authority, Revenue Bonds, CommonSpirit Health, Series 2019A-2, 5.000%, 8/01/44	8/29 at 100.00	BBB+	1,887,072
990	Washington Health Care Facilities Authority, Revenue Bonds, Fred Hutchinson Cancer Research Center, Series 2011A, 5.625%, 1/01/35	1/21 at 100.00	A+	1,023,571
4,000	Washington Health Care Facilities Authority, Revenue Bonds, Providence Health & Services, Refunding Series 2012A, 5.000%, 10/01/32	10/22 at 100.00	AA-	4,378,160

7

NXR	Nuveen Select Tax-Free Income Portfolio 3 (continued)
	Portfolio of Investments December 31, 2019
	(Unaudited)

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	Washington (continued)
$1,725	Washington State, General Obligation Bonds, Various Purpose Series 2015B, 5.000%, 2/01/37	2/25 at 100.00	Aaa	$1,991,789
8,520	Total Washington			9,525,788
	Wisconsin – 0.6%
1,250	Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Marshfield Clinic, Series 2012B, 5.000%, 2/15/32	2/22 at 100.00	A-	1,334,250
$226,770	Total Long-Term Investments (cost $173,933,264)			208,254,984

Principal Amount (000)	Description (1)	Optional Call Provisions (2)	Ratings (3)	Value
	SHORT-TERM INVESTMENTS – 1.0%
	MUNICIPAL BONDS – 1.0%
	Florida – 1.0%
$1,040	Florida Development Finance Corporation, Florida, Surface Transportation Facility Revenue Bonds, Virgin Trains USA Passenger Rail Project , Variable Rate Demand Obligations, Series 2019A, 6.250%, 1/01/49 (AMT) (Mandatory Put 1/01/24), 144A (7)	3/20 at 104.00	N/R	$1,000,022
1,055	Florida Development Finance Corporation, Florida, Surface Transportation Facility Revenue Bonds, Virgin Trains USA Passenger Rail Project , Variable Rate Demand Obligations, Series 2019B, 1.900%, 1/01/49 (AMT) (Mandatory Put 3/17/20) (7)	No Opt. Call	VMIG-1	1,056,171
$2,095	Total Short-Term Investments (cost $2,095,000)			2,056,193
	Total Investments (cost $176,028,264) – 98.0%			210,311,177
	Borrowings – (0.8)% (8)			(1,697,634)
	Other Assets Less Liabilities – 2.8%			6,015,483
	Net Assets Applicable to Common Shares  –  100%			$214,629,026

Part F of Form N-PORT was prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) and in conformity with the applicable rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) related to interim filings. Part F of Form N-PORT does not include all information and footnotes required by U.S. GAAP for complete financial statements. Certain footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted from this report pursuant to the rules of the SEC. For a full set of the Fund’s notes to financial statements, please refer to the Fund’s most recently filed annual or semi-annual report.

Fair Value Measurements

The Fund's investments in securities are recorded at their estimated fair value. Fair value is defined as the price that would be received upon selling an investment or transferring a liability in an orderly transaction to an independent buyer in the principal or most advantageous market for the investment. A three-tier hierarchy is used to maximize the use of observable market data and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability. Observable inputs are based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability. Unobservable inputs are based on the best information available in the circumstances. The following is a summary of the three-tiered hierarchy of valuation input levels.

Level 1  –     Inputs are unadjusted and prices are determined using quoted prices in active markets for identical securities.

Level 2  –     Prices are determined using other significant observable inputs (including quoted prices for similar securities, interest rates, credit spreads, etc.).

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Level 3  –     Prices are determined using significant unobservable inputs (including management’s assumptions in determining the fair value of investments).

The inputs or methodologies used for valuing securities are not an indication of the risks associated with investing in those securities. The following is a summary of the Fund’s fair value measurements as of the end of the reporting period:

	Level 1	Level 2	Level 3	Total
Long-Term Investments:
Municipal Bonds	$ —	$208,254,984	$ —	$208,254,984
Short-Term Investments:
Municipal Bonds	—	2,056,193	—	2,056,193
Total	$ —	$210,311,177	$ —	$210,311,177

(1)	All percentages shown in the Portfolio of Investments are based on net assets applicable to common shares.
(2)	Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns.
(3)	For financial reporting purposes, the ratings disclosed are the highest of Standard & Poor’s Group (“Standard & Poor’s”), Moody’s Investors Service, Inc. (“Moody’s”) or Fitch, Inc. (“Fitch”) rating. This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Ratings below BBB by Standard & Poor’s, Baa by Moody’s or BBB by Fitch are considered to be below investment grade. Holdings designated N/R are not rated by any of these national rating agencies.
(4)	Step-up coupon bond, a bond with a coupon that increases ("steps up"), usually at regular intervals, while the bond is outstanding. The rate shown is the coupon as of the end of the reporting period.
(5)	Backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities, which ensure the timely payment of principal and interest.
(6)	Defaulted security. A security whose issuer has failed to fully pay principal and/or interest when due, or is under the protection of bankruptcy.
(7)	Investment has a maturity of greater than one year, but has variable rate and/or demand features which qualify it as a short-term investment. The rate disclosed, as well as the reference rate and spread, where applicable, is that in effect as of the end of the reporting period. This rate changes periodically based on market conditions or a specified market index.
(8)	Borrowings as a percentage of Total Investments is 0.8%.
144A	Investment is exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These investments may only be resold in transactions exempt from registration, which are normally those transactions with qualified institutional buyers.
AMT	Alternative Minimum Tax
ETM	Escrowed to maturity

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