Exhibit 99.3 CONSENT TO BE NAMED AS A DIRECTOR OF HARVARD BIOSCIENCE, INC. I hereby consent to be named as a person to become a director of Harvard Bioscience, Inc., a Delaware corporation (the "Company"), in the registration statement on Form S-1 filed by the Company with the Securities and Exchange Commission with respect to the public offering of Common Stock of the Company. /S/ JOHN F. KENNEDY ---------------------------------- Name: John F. Kennedy Date: October 24, 2000