Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of Sylvamo Corporation (the “Company”) for the period ended December 31, 2023 (the “Report”), each of the undersigned certifies, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

By:    /s/ Jean-Michel Ribiéras                

Jean-Michel Ribiéras

Chairman and Chief Executive Officer

February 21, 2024

By:    John V. Sims                    

John V. Sims

Senior Vice President and Chief Financial Officer

February 21, 2024