D'Astous (undisclosed) will be a game-time decision versus the Canadiens in Game 6 on Friday, Benjamin Pierce of the Lightning's official site reports.
Head coach Jon Cooper wouldn't provide any insight on D'Astous' availability, so fantasy managers will need to take a wait-and-see approach. If D'Astous receives the all-clear to return, Max Crozier could be a healthy scratch.