Dach, playing for Team Canada, was hurt during an exhibition win last week against Russia ahead of the world junior championships.
The 19-year-old was injured on what seemed like a harmless bodycheck in the neutral zone in the third period. After the hit, the Canada captain pulled off his glove, skated off the ice and went directly to the locker room area in Edmonton, Alberta.
Selected by Chicago with the No. 3 pick in the 2019 draft, Dach had eight goals and 15 assists in 64 games during his rookie season with the Blackhawks.
Information from The Associated Press was used in this report.