AMG FUNDS III

AMENDMENT NO. 30 TO THE DECLARATION OF TRUST

CERTIFICATE AND INSTRUMENT OF AMENDMENT

December 4, 2020

The undersigned, an officer of AMG Funds III (the “Trust”), a business trust organized under the laws of The Commonwealth of Massachusetts, does hereby amend the Trust’s Declaration of Trust dated November 23, 1987, as amended from time to time (the “Declaration of Trust”), as follows:

WHEREAS, Section 5.11 of the Declaration of Trust provides that the Trustees may authorize the division of shares into two or more series and that the different series shall be established and designated upon the execution of a majority of the then Trustees of an instrument setting forth such establishment and designation;

WHEREAS, Section 5.12 of the Declaration of Trust provides that the Trustees may issue classes of shares of any series or divide the shares of any series into classes and that the classes shall be established and designated upon the execution by a majority of the then Trustees, or an officer of the Trust pursuant to the vote of a majority of the Trustees, of an instrument setting forth such establishment and designation;

WHEREAS, a majority of the Trustees wish to redesignate AMG Managers Global Income Opportunity Fund as AMG GW&K High Income Fund;

WHEREAS, a majority of the Trustees wish to establish and designate an additional class of shares as Class I shares of AMG Managers Global Income Opportunity Fund; and

WHEREAS, a majority of the Trustees have authorized and directed the officers of AMG Funds III to prepare and file with the Secretary of The Commonwealth of Massachusetts and other applicable authorities an amendment to the Declaration of Trust to reflect the Fund name and share class changes described above;

NOW THEREFORE, effective as of December 4, 2020, pursuant to Section 5.11 of the Declaration of Trust, AMG Managers Global Income Opportunity Fund is hereby redesignated as AMG GW&K High Income Fund and, pursuant to Section 5.12 of the Declaration of Trust, Class I shares of AMG Managers Global Income Opportunity Fund are hereby designated and established.

The foregoing amendment may be signed in counterparts with the same effect as if all signatories had signed the same document. All such counterparts shall be deemed an original, shall be construed together and shall constitute one and the same instrument.

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IN WITNESS WHEREOF, the undersigned has executed this instrument as of the date first set forth above.

/s/ Mark. J. Duggan
Name:	Mark J. Duggan
Title:	Chief Legal Officer