In Couturier's absence, the Flyers plan to move Nolan Patrick up to center the top line between Claude Giroux and Jakub Voracek.
Couturier had to be helped off the ice at the team's practice on Tuesday after a collision with teammateRadko Gudas, who was moving backward and didn't see Couturier.
After tumbling to the ice, Couturier threw his stick against the boards in anger. He was assisted off the ice.
The Flyers trail the Penguins2-1 in their best-of-seven first-round series. Couturier leads the team in postseason scoring with a goal and two assists.
Flyers star Couturier injured in practice
Flyers center Sean Couturier gets upended in a scary collision during practice on Tuesday, placing his status for Game 4 in jeopardy.