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Exhibit 31.3

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

PURSUANT TO SECTION 302 OF

THE SARBANES-OXLEY ACT OF 2002

I, Thomas A. West, certify that:

1.I have reviewed this Form 10-K/A of Intersect ENT, Inc.;

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;

April 29, 2022
/S/ THOMAS A. WEST
Thomas A. West President and Chief Executive Officer (Principal Executive Officer)