Sebastian Collberg's NHL rights have been handed to the New York Islanders as part of the Tomas Vanek trade.
Sebastian Collberg has been sent back to Frolunda of the Swedish Hockey League.
Sebastian Collberg will play in the NHL or return to Sweden for another year.
Sebastian Collberg is only able to do off-ice workouts after suffering a knee injury in August practicing with the Swedish junior squad.
Sebastian Collberg signed a three-year contract with the Montreal Canadiens on Tuesday.
Forward Sebastian Collberg scored a goal Saturday as Sweden defeated Latvia 5-1 at the junior ice hockey world championships to secure a spot in the knockout round.
Sebastian Collberg scored a goal in Sweden's 3-2 shootout win over Switzerland in the 2013 World Junior Championship.
Sebastian Collberg was selected by the Montreal Canadiens with the 33rd overall pick in the 2012 NHL Entry Draft.