Senators coach Paul MacLean said after the morning skate that Gryba will suit up Tuesday night, with Ottawa leading the first-round series 2-1.
The bruising defenseman was suspended for the last two games for his hit on Montreal center Lars Eller in Game 1. Eller was sent to hospital with a concussion, broken nose and lost teeth. He remains out of the Canadiens' lineup.
Montreal coach Michel Therrien and a number of his players were incensed after the hit, sparking an exchange of words in which Montreal's Brandon Prust called MacLean "a bug-eyed, fat walrus."