Exhibit 31.2
CERTIFICATION PURSUANT TO
SECTION 302 OF
THE SARBANES-OXLEY ACT OF 2002
I, Mary Beth Dooley, certify that:
1.  | 
     I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K/A of Synlogic, Inc.; and  | 
    
2.  | 
     Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.  | 
    
Date: April 30, 2025
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/s/ MARY BETH DOOLEY  | 
    
Mary Beth Dooley  | 
    
Principal Financial Officer (principal financial officer)  |