Garbutt was disciplined for kneeing Edmonton Oilers forward Taylor Hall in the Stars' 3-2 victory last Tuesday.
Garbutt was assessed a minor penalty for tripping on the play. He's considered a repeat offender and will forfeit US$43,902.44 in salary.
Lowry, meanwhile, was suspended for boarding Sabres forward Patrick Kaleta in Wednesday's 2-1 victory in Buffalo. Lowry, who will forfeit $4,453.41, was assessed a major penalty for boarding and a game misconduct on the play.