The embattled New York Democrat had been scheduled to speak on Friday night. State party spokesman Graeme Zielinski said Friday morning that Weiner had canceled but he had no other details.
Weiner has been involved in an embarrassing flap regarding a lewd picture sent from his Twitter account. Weiner has said he's done talking about the issue.
The state party says it expects more than 2,000 people at its convention Friday and Saturday. It says attendance last year was about 1,300.