Exhibit 99.3

CONSENT TO REFERENCE IN REGISTRATION STATEMENT

April 7, 2021

Northern Star Investment Corp. II

c/o Graubard Miller

The Chrysler Building

405 Lexington Avenue, 11th Floor

New York, NY 10174

Northern Star Investment Corp. II (the “Company”) is filing a Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”). In connection therewith, I hereby consent, pursuant to Rule 438 of the Securities Act, to the reference to me in the proxy statement/prospectus included in such Registration Statement as a future member of the board of directors of the Company, such appointment to commence upon the closing of the business combination described in the proxy statement/prospectus.

Sincerely,

William Capuzzi

(Name)

/s/ William Capuzzi

(Signature)