Skellefteå's Anton Olsson and Södertälje's Ludvig Jansson replace the duo.
Joel Nyström was an uncertain card already at the squad selection when he had foot surgery after the season.
The ice hockey association now announces on social media that he and Hävelid are out.
Recently, it was also clear that star William Eklund, who has played several NHL games, has turned down the offer.
The JVM will be decided on August 9-20 due to the corona outbreak during the tournament last winter and will be broadcast on SVT and Viaplay.