Butler was named an assistant coach to Tom Renney for Canada men's national junior ice hockey team at the 1999 World Junior Ice Hockey Championships in Winnipeg. Canada claimed a silver medal, losing to team Russia in the final. Butler returned to the national stage after a year off, as head coach of the Canadian juniors 2001 World Junior Ice Hockey Championships held in Russia. Canada defeated team Sweden in the bronze medal game, with Battalion member Raffi Torres scoring in overtime. Butler returned for a second consecutive stint as head coach of the juniors for 2002 World Junior Ice Hockey Championships held in the Czech Republic. Butler became only the third person in Canadian Hockey Association history to coach the national junior team in consecutive years since the CHA’s Program of Excellence began in 1982. Canada earned a silver medal after losing 5-4 to Russia in the championship game.