SCHEDULE 14A
                                 (Rule 14a-101)

                     INFORMATION REQUIRED IN PROXY STATEMENT
                            SCHEDULE 14A INFORMATION

           Proxy Statement Pursuant to Section 14(a) of the Securities
                      Exchange Act of 1934 (Amendment No. )

Filed by the Registrant  [X]
Filed by a Party other than the Registrant [_]
Check the appropriate box:
[  ]   Preliminary Proxy Statement           [_]   Confidential, for use of the
                                                   Commission only (as permitted
                                                   by Rule 14a-6(e)(2))
[_]  Definitive proxy statement
[X]  Definitive additional materials
[_]  Soliciting material pursuant to Rule 14a-12

                          IXIS Advisor Funds Trust III
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                (Name of Registrant as Specified In Its Charter)
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of filing fee (check the appropriate box):
[X]  No fee required
[_]  Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
         (1)  Title of each class of securities to which transaction applies:
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         (2)  Aggregate number of securities to which transaction applies:
         -----------------------------------------------------------------------
         (3)  Per unit price or other underlying value of transaction computed
              pursuant to Exchange Act Rule 0-11 (Set forth the amount on which
              the filing fee is calculated and state how it was determined):
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         (4)  Proposed maximum aggregate value of transaction:
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         (5)  Total fee paid:
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[_]  Fee paid previously with preliminary materials.
[_]  Check box if any part of the fee is offset as provided by Exchange Act
     Rule 0-11(a)(2) and identify the filing for which the offsetting fee was
     paid previously. Identify the previous filing by registration statement
     number, or the Form or Schedule and the date of its filing.
- --------------------------------------------------------------------------------
         (1) Amount Previously Paid:
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         (2) Form, Schedule or Registration Statement No.:
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         (3) Filing Party:
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         (4) Date Filed:




June 24, 2005


Dear Shareholder:

In April you received proxy voting materials  regarding a proposal to change the
Declarations  of Trust for the IXIS Advisor Funds and Loomis  Sayles Funds.  The
Special Meeting of Shareholders was held on June 2, 2005 and was adjourned until
June 22,  2005 to allow for the  solicitation  of  additional  necessary  votes.
Because the requisite votes were not received on that date, the meeting has been
adjourned again until July 21, 2005.

TO DATE, WE HAVE NOT RECEIVED YOUR VOTE. PLEASE TAKE A FEW MINUTES TO REVIEW THE
INFORMATION  PROVIDED IN THIS LETTER AND VOTE YOUR SHARES.  WE CANNOT  EMPHASIZE
ENOUGH THE IMPORTANCE OF YOUR VOTE, REGARDLESS OF HOW MANY SHARES YOU OWN. IF WE
DO NOT RECEIVE  ENOUGH VOTES BY JULY 21, WE MAY HAVE TO RESOLICIT  SHAREHOLDERS.
PLEASE HELP YOUR FUND AVOID THE  EXPENSE OF  ADDITIONAL  SOLICITATION  BY VOTING
TODAY.

The  Agreement  and  Declarations  of Trust  for each  Trust  governs  the basic
operations of the Trusts.  Shareholder approval is required for certain changes.
The changes  described in the proxy statement you received in April are intended
to modernize the Declarations of Trust to accommodate changes in law or practice
since the Declarations of Trust were last approved by  shareholders,  as well as
to make the Declarations of Trust uniform across the Trusts.  We anticipate that
the  overall  effect of these  changes  will  reduce  costs and  expenses in the
administration  of the Funds and provide more  flexibility for the operations of
the Funds, within limits of applicable law.

VOTE BY TOLL-FREE  TELEPHONE,  INTERNET OR MAIL Voting by toll-free telephone or
via the Internet is the  quickest way to register  your vote before the meeting.
Of  course,  you  also  may  vote  by  returning  the  enclosed  proxy  card.  A
self-addressed,  postage-paid  envelope has been enclosed for your  convenience.
Please see the enclosed proxy card for more information and voting instructions.
If you do vote via the  Internet or by  telephone,  you do not need to mail your
proxy card.  If you want to change  your vote,  you may do so using any of these
methods.  A proxy  solicitation  firm,  Alamo Direct,  may call to remind you to
return your proxy.

Thank you for your cooperation in voting on this important proposal. If you have
questions, please call your financial representative.

Sincerely,


John T. Hailer
President, IXIS Advisor Funds
and Loomis Sayles Funds II


 IXIS Asset Management Distributors, L.P. 399 Boylston Street  Boston, MA 02116
                            www.ixisadvisorfunds.com



June 24, 2005


Dear Shareholder:

In April you received proxy voting materials regarding a proposal to change the
Declarations of Trust for the IXIS Advisor Funds and Loomis Sayles Funds. The
Special Meeting of Shareholders was held on June 2, 2005 and was adjourned until
June 22, 2005 to allow for the solicitation of additional necessary votes.
Because the requisite votes were not received on that date, the meeting has been
adjourned again until July 21, 2005.

To date, we have not received your vote. Please take a few minutes to review the
information provided in this letter and vote your shares. We cannot emphasize
enough the importance of your vote, regardless of how many shares you own. If we
do not receive enough votes by July 21, we may have to resolicit shareholders.
Please help your fund avoid the expense of additional solicitation by voting
today.

The Agreement and Declarations of Trust for each Trust governs the basic
operations of the Trusts. Shareholder approval is required for certain changes.
The changes described in the proxy statement you received in April are intended
to modernize the Declarations of Trust to accommodate changes in law or practice
since the Declarations of Trust were last approved by shareholders, as well as
to make the Declarations of Trust uniform across the Trusts. We anticipate that
the overall effect of these changes will reduce costs and expenses in the
administration of the Funds and provide more flexibility for the operations of
the Funds, within limits of applicable law.

Vote by toll-free telephone, Internet or mail
Voting by toll-free telephone or via the Internet is the quickest way to
register your vote before the meeting. Of course, you also may vote by returning
the enclosed proxy card. A self-addressed, postage-paid envelope has been
enclosed for your convenience. Please see the enclosed proxy card for more
information and voting instructions. If you do vote via the Internet or by
telephone, you do not need to mail your proxy card. If you want to change your
vote, you may do so using any of these methods. A proxy solicitation firm, Alamo
Direct, may call to remind you to return your proxy.

Thank you for your cooperation in voting on this important proposal. If you have
questions, please call your financial representative. Or, if your questions
relate specifically to the proxy, please call our service center representatives
toll-free at 800-225-5478.

Sincerely,


John T. Hailer
President, IXIS Advisor Funds
and Loomis Sayles Funds II


 IXIS Asset Management Distributors, L.P. 399 Boylston Street Boston, MA 02116
                            www.ixisadvisorfunds.com



MEETING ADJOURNED AGAIN. YOUR VOTE IS STILL NEEDED!



MEETING ADJOURNED AGAIN. YOUR VOTE IS STILL NEEDED!



MEETING ADJOURNED AGAIN. YOUR VOTE IS STILL NEEDED!



Microsoft Word 11.0.5604;Excerpts of www.ixisadvisorfunds.com website:

On homepage:

Online proxy voting is now available for all shareholders. [Links to page below]
- -------------------

IXIS Advisor Funds: Online Proxy Voting


                  Online Proxy Voting

                  IXIS Asset Management Distributors, L.P. has announced
                  an important proposal regarding many of our funds, which
                  requires a shareholder vote.

                  The Special Meeting of Shareholders was held on June 2, 2005
                  and was adjourned for certain funds to allow for the
                  solicitation of additional necessary votes in connection with
                  the proposal to change the Declarations of Trust. The meeting
                  has been rescheduled for July 21,
                  2005. Funds still eligible to vote for the proposal to change
                  the Declarations of Trust are listed below.


Please vote on this important proposal if you own shares in the following funds:

Harris Associates Focused Value Fund IXIS Equity Diversified Portfolio IXIS
Moderate Diversified Portfolio Loomis Sayles Aggressive Growth Fund Loomis
Sayles Growth Fund Loomis Sayles High Income Fund Loomis Sayles Institutional
High Income Fund Loomis Sayles Investment Grade Bond Fund
Loomis Sayles Limited Term Government and Agency Fund Loomis Sayles Municipal
Income Fund Loomis Sayles Research Fund Loomis Sayles Small Cap Growth Fund
Loomis Sayles Strategic Income Fund Loomis Sayles Tax-Managed Equity Fund Loomis
Sayles Value Fund Loomis Sayles Worldwide Fund
                          [Link] Proxy letter to shareholders* [Link] Official
                           proxy statement*
                          [Link to vote.proxy-direct.com] Enter our Electronic
                          Proxy Voting Center


                   Remember - your vote counts

                           Important note:
                        Please help your fund avoid the expense of additional
                        solicitation by voting today. If you own shares in more
                        than one account, you may have received a separate card
                        for each account. These are not duplicate cards; it is
                        important to vote each account represented by the proxy
                        cards received.

                    Your vote is extremely important, regardless of the number
                  of shares you own. Voting promptly is also essential. If we do
                  not receive enough votes, we will have to resolicit
                  shareholders. You may receive a reminder call to return your
                  proxy.

                  If you vote electronically, you do not need to mail your proxy
                  card.

                  However, if you want to change your vote you may do so using
                  the proxy card, telephone or Internet.

                  Thank you for your cooperation in voting on this important
                  proposal. If you have any questions regarding the proxy
                  statement, please call your financial advisor, or call IXIS
                  Advisor Funds at 800-225-5478.

                  * To download or print PDF files, you must have Adobe Acrobat
                  Reader software on your computer. You may obtain this software
                  free of charge at Adobe's Web site.