Brassard likely will play for the Charlottetown Islanders of the Quebec Major Junior Hockey League this season.
Tampa Bay also signed 21-year-old forward Joel Vermin to a three-year, entry-level contract. The Lightning selected the Swiss native in the seventh round (No. 186) of the 2013 NHL Draft. Vermin had 13 goals and 35 points in 47 games with Bern of the Swiss A-League last season.