Fucale was named to Canada's roster for the 2014 and 2015 World Junior Championship. After Canada finished a disappointing fourth at the 2014 event in Sweden, Fucale led Team Canada to a gold medal, their first in five years, at the 2015 IIHF World Junior Championship. In so doing, Fucale improved his save percentage to .949 over five games in 2015, up from .902 in the previous tournament; his goals-against average improved to 1.20 from 2.42. With eight wins, Fucale ties Stéphane Fiset (1989/1990) and Marc-André Fleury (2003/2004) for most wins by a Canadian goaltender at the IIHF U20 tournament.