New Hampshire Statutes § 655:39 Death of Candidate

If any candidate to be voted for at the general election shall die between the date of nomination and the day of election, a new candidate may be substituted by the appropriate party committee by submitting the name of the new candidate to the secretary of state within 3 days of the notice of death. The name of the substitute candidate shall be placed on the ballots as provided in RSA 656:21 .