Exhibit 31.3
CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER
PURSUANT TO EXCHANGE ACT RULE 13a-14(a)/15d-14(a)
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, Michael Roberts, certify that:
| 1. | I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K of Adaptin Bio, 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: June 12, 2026 | By: | /s/ Michael Roberts |
| Michael Roberts | ||
| President and Chief Executive Officer | ||
| (Principal Executive Officer) |