SUPPLEMENT NO. 2 TO THE OFFER TO PURCHASE


         This Supplement (the "Supplement") supplements the Offer to Purchase,
dated May 14, 1999, previously supplemented by the Supplement dated May 14, 1999
(as so supplemented, the "Offer to Purchase") with respect to the offer by KRF3
Acquisition Company, L.L.C. (the "Purchaser") to purchase all of the limited
partnership interests ("Units") of Krupp Realty Fund, Ltd.-III at a price of
$550 per Unit, payable to the holder in cash, less the aggregate amount of
distributions per Unit, if any, made by the Partnership from and after May 14,
1999, without interest. This Supplement should be read in conjunction with the
Offer to Purchase. Capitalized terms used but not defined herein have the
meanings assigned to them in the Offer to Purchase.

         The purpose of this Supplement is to (1) extend the expiration date of
the Offer and (2) waive the Minimum Condition. The Offer has been extended to
12:00 midnight, New York City time, on June 18, 1999, unless further extended
(the "Expiration Date"). The Minimum Condition has been waived so that the Offer
is no longer conditioned upon a minimum number of shares of Units being validly
tendered and not withdrawn prior to the Expiration Date. EXCEPT AS SET FORTH
HEREIN, THE TERMS AND CONDITIONS OF THE OFFER REMAIN AS SET FORTH IN THE OFFER
TO PURCHASE.

THIS TRANSACTION HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION. NOR HAS THE SECURITIES AND EXCHANGE COMMISSION PASSED UPON
THE FAIRNESS OR MERITS OF THIS TRANSACTION NOR UPON THE ACCURACY OR ADEQUACY OF
THE INFORMATION CONTAINED IN THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY
IS UNLAWFUL.

                              --------------------

         THE OFFER HAS BEEN EXTENDED TO 12:00 MIDNIGHT, NEW YORK CITY TIME ON
JUNE 18, 1999 (THE "EXPIRATION DATE"). UNITS TENDERED PURSUANT TO THE OFFER MAY
BE WITHDRAWN AT ANY TIME PRIOR TO THE EXPIRATION DATE.

         UNITHOLDERS WHO HAVE PREVIOUSLY VALIDLY TENDERED AND NOT PROPERLY
WITHDRAWN THEIR UNITS PURSUANT TO THE OFFER ARE NOT REQUIRED TO TAKE ANY FURTHER
ACTION.

                               -------------------

                  THE DATE OF THIS SUPPLEMENT IS JUNE 11, 1999.



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                       AMENDMENTS TO THE OFFER TO PURCHASE

         The following sections of the Offer to Purchase have been modified as
described below. Except as set forth below and elsewhere in this Supplement, the
terms and conditions of the Offer remain as stated in the Offer to Purchase.

COVER PAGE

         The first paragraph of the cover page is amended by deleting such
paragraph and substituting the following therefor:

                  "THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT MIDNIGHT NEW
                  YORK CITY TIME, ON JUNE 18, 1999, UNLESS THE OFFER IS
                  EXTENDED."

         The third paragraph of the cover page is amended by deleting such
paragraph and substituting the following therefor:

                  "The Offer is conditioned upon, among other things, the
                  satisfaction of the conditions set forth in "The
                  Offer--Section 8. Conditions of the Offer," any of which, the
                  Purchaser reserves the right to waive without notice to the
                  Unitholders. The Offer is not subject to any financing
                  condition and is not conditioned on any minimum number of
                  Units being validly tendered and not withdrawn prior to the
                  Expiration Date ( the "Minimum Condition"). "

INTRODUCTION

         This section is amended by deleting the second paragraph thereof and
substituting the following therefor:

                  "The Offer is conditioned upon, among other things, the
                  satisfaction of the conditions set forth in "The
                  Offer--Section 8. Conditions of the Offer," any of which, the
                  Purchaser reserves the right to waive without notice to the
                  Unitholders. The Offer is not subject to any financing
                  condition and is not conditioned on any minimum number of
                  Units being validly tendered and not withdrawn prior to the
                  Expiration Date ( the "Minimum Condition"). "

         This section is further amended by deleting the fifth sentence of the
third paragraph thereof and substituting the following therefor:

                  "The Purchaser may, following the consummation of the Offer,
                  propose and seek to have the Partnership consummate a merger
                  or similar business combination with the Purchaser (the
                  "Proposed Merger"). In the event the Purchaser acquires a
                  majority of the outstanding Units in the Offer, the Purchaser
                  currently intends to propose the Proposed Merger."

         This section is further amended by deleting the final sentence of the
fourth paragraph thereof and substituting the following therefor:

                  "Accordingly, if the Purchaser seeks to consummate the
                  Proposed Merger it will propose and seek to have the
                  Partnership amend the Partnership Agreement to permit the
                  Partnership to enter into a merger agreement as described
                  above and to consummate the Proposed Merger (the "Proposed
                  Amendment")."

         This section is further amended by deleting the sentence comprising the
fifth paragraph thereof.

         This section is further amended by deleting the fifth negative factor
listed and substituting therefor:

                  "Consummation of the Offer will result in a termination of the
                  Partnership for Federal income tax purposes if 50% or more of
                  Units will have been sold in the 12-month period preceding
                  (and including) the date on which the Offer is consummated.
                  Any such termination will, among other things, cause the
                  Partnership to start new depreciable lives for its assets.
                  This generally would decrease the annual average depreciation
                  deductions allocable to Units not tendered pursuant to the
                  Offer (thereby increasing the taxable income allocable to such
                  Units in each such year), but would



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                  have no effect on the total depreciation deductions available
                  over the useful lives of the assets of the Partnership.
                  However, if the Purchaser consummates the Offer, and the
                  Proposed Merger is consummated, Units held by Unitholders who
                  do not tender their Units in the Offer will be converted into
                  cash in the Proposed Merger."

SPECIAL FACTORS - SECTION 3. PURPOSE OF THE OFFER AND PLANS FOR THE
                  PARTNERSHIP-Purpose.

         This section is amended and supplemented by deleting the third sentence
of the first paragraph thereof and substituting the following therefor:

                  "Following consummation of the Offer, the Purchaser may (i)
                  seek to acquire additional Units through open market
                  purchases, privately negotiated transactions, a tender offer
                  or exchange offer or otherwise, upon such terms and at such
                  prices as it may determine, which may be more or less than the
                  Offer Price, and/or (ii) solicit the approval of the
                  Partnership for the Proposed Amendment and Proposed Merger.
                  Alternatively, the Purchaser may abandon plans to acquire
                  control of the Partnership or any additional Units and/or sell
                  or otherwise dispose of any or all of the Units acquired by
                  them pursuant to the Offer or otherwise, upon such terms and
                  at such prices as they shall determine. If the Purchaser
                  acquires a majority of the outstanding Units in the Offer, the
                  Purchaser intends, as soon as soon as practicable following
                  consummation of the Offer, to propose and seek to consummate
                  the Proposed Amendment and the Proposed Merger."

         This section is further amended and supplemented by deleting the first
sentence of the fourth paragraph thereof and substituting the following
therefor:

                  "If the Purchaser acquires a majority of the Units pursuant to
                  the Offer, as soon as practicable following the consummation
                  of the Offer the Purchaser intends to solicit (or, pursuant to
                  the Partnership Agreement, request the General Partners to
                  solicit) the approval of Unitholders to the Proposed Amendment
                  and the Proposed Merger. If the Purchaser acquires less than a
                  majority of the Units pursuant to the Offer, the Purchaser may
                  also elect to effect such a solicitation."

         This section is further amended and supplemented by deleting the third
sentence of the fourth paragraph thereof and substituting the following
therefor:

                  "Although the Purchaser presently intends to seek to effect
                  the Proposed Amendment and the Proposed Merger promptly
                  following the consummation of the Offer if the Purchaser
                  acquires a majority of the Units pursuant to the Offer, there
                  is no assurance that such proposals will be made, or that if
                  proposed, they will not be delayed or abandoned."

         This section is further amended by deleting the fifth paragraph
thereof.

SPECIAL FACTORS -- SECTION 4. CONFLICTS OF INTEREST AND TRANSACTIONS WITH
                   AFFILIATE - Voting Power of the Purchaser.

         This section is amended by deleting the first and second sentences
thereof and substituting the following therefor:

                  "The Offer is not conditioned on any minimum number of Units
                  being validly tendered and not withdrawn prior to the
                  Expiration Date. If more than 50% of Units are tendered
                  pursuant to this Offer, the Purchaser accepts for payment the
                  Units tendered and the General Partners admit the Purchaser as
                  a substitute limited partner under the Partnership Agreement
                  (which admittance allows a Unitholder to vote), then the
                  Purchaser would have the power to vote a majority of the
                  Partnership's Units."



                                                                               4

SPECIAL FACTORS -- SECTION 7.  CERTAIN FEDERAL INCOME TAX CONSEQUENCES.
                   CONSEQUENCES TO A NON-TENDERING UNITHOLDER.

         This section is amended by deleting the first paragraph thereof and
substituting the following therefor:

                  "Depending on the number of Unitholders who tender their
                  Units, sales of Units pursuant to the Offer could result in a
                  sale or exchange of 50% or more of the total Units in
                  Partnership capital and profits within a 12-month period. If
                  this occurs, a termination of the Partnership for Federal
                  income tax purposes will occur and the taxable year of the
                  Partnership will close. The Properties (subject to related
                  debt) of the Partnership will be treated as contributed to a
                  new partnership. The Partnership will then be deemed to
                  distribute to its Unitholders interests in the new partnership
                  in a deemed liquidation of the Partnership. Following a
                  constructive termination of the Partnership, the Partnership
                  will start a new depreciable life for its assets and, as a
                  result, the Partnership's current annual depreciation
                  deductions will be reduced and taken over a longer period of
                  years than is the case currently. In addition, the
                  consequences of a termination of the Partnership include
                  erasure of the Partnership's tax elections and changes in the
                  methods of depreciation available to the Partnership for tax
                  purposes."

THE OFFER -- SECTION 7. CERTAIN INFORMATION CONCERNING THE PURCHASER AND
             ITS AFFILIATES.

         This section is amended by supplementing the following after the eighth
paragraph thereof:

                  "By 12:00 noon on June 11, 1999, New York City time, valid
                  acceptances of the Offer had been received in respect of
                  7,862.5 Units representing approxmately 31.45% of Units.
                  Pursuant to the Agreement of Assignment of Transfer executed
                  in connection with such tenders, unless such assignments are
                  withdrawn, the Purchaser may exercise the voting rights of
                  such Units."


THE OFFER -- SECTION 8.  CONDITIONS OF THE OFFER

         This section is amended by deleting the first paragraph thereof and
substituting the following therefor:

                  "Notwithstanding any other provisions of the Offer and in
                  addition to (and not in limitation of) the Purchaser's rights
                  to extend and amend the Offer at any time in its sole
                  discretion, the Purchaser shall not be required to accept for
                  payment, purchase or pay for, subject to Rule 14e-1(c) under
                  the Exchange Act, any tendered Units (whether or not any Units
                  have theretofore been accepted for payment or paid for
                  pursuant to the Offer), and may terminate the Offer as to any
                  Units not then paid for, if (i) the Purchaser shall not have
                  confirmed to its reasonable satisfaction that, upon purchase
                  of the Units pursuant to the Offer, the Purchaser will have
                  full rights to ownership as to all such Units and the
                  Purchaser will be admitted as a substitute limited partner
                  under Section 10.3 of the Partnership Agreement, (ii) the
                  Purchaser shall not have confirmed to its reasonable
                  satisfaction that, upon the purchase of the Units pursuant to
                  the Offer, the transfer restrictions set forth in Section 10.4
                  of the Partnership Agreement are inapplicable, or (iii) all
                  authorizations, consents, orders or approvals of, or
                  declarations or filings with, or expirations of waiting
                  periods imposed by, any court, administrative agency or
                  commission or other governmental authority or instrumentality,
                  domestic or foreign, necessary for the consummation of the
                  transactions contemplated by the Offer shall not have been
                  filed, occurred or been obtained on or before the Expiration
                  Date. The Offer is not conditioned on any minimum number of
                  Units being validly tendered and not withdrawn prior to the
                  Expiration Date."



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                      Agreement of Assignment and Transfer

         The Purchaser has updated its Agreement of Assignment and Transfer,
which is being distributed herewith. Unitholders may use the updated Agreement
of Assignment and Transfer or the originally distributed Agreement of Assignment
and Transfer to tender their Units. All such documents shall be deemed to have
been amended, as appropriate, by this Supplement. If needed, assistance or
additional copies of the Offer to Purchase and Supplement No. 1 can be obtained
by making a request to the Information Agent at the following address:



                      KRUPP FUNDS GROUP LIMITED PARTNERSHIP

                                One Beacon Street
                                   Suite 1500
                           Boston, Massachusetts 02108
                          Attention: Investor Services

                              Phone: 1-800-25-KRUPP
                                (1-800-255-7877)
                               Fax: (617) 423-8919