Wedgewood, who plays for the Ontario Hockey League's Plymouth Whalers, started two games for Canada in the preliminary round.
The New Jersey Devils draft pick stopped 26 shots in a 5-0 shutout win over the Czech Republic and made 30 saves in a 3-2 win over the United States.
Mark Visentin of the Niagara IceDogs also appeared in two games for Canada, stopping 24 shots in both an 8-1 win over Finland and 10-2 victory over Denmark.
The winner of the semifinal plays for gold, while the loser plays for bronze Thursday.
Sweden and Finland were to play in the other semifinal.