Szabados has represented Canada internationally at the Under-22 and Senior levels.
 she made her Team Canada debut in 2006, helping Canada to a gold medal at the 2006 4 Nations Cup, held in Kitchener, Ontario.
In the opening game of the tournament, Szabados recorded a 3–0 shutout against the United States.
Szabados also made her debut with Canada's Under-22 women's team in 2006.
 She won three straight gold medals at the Air Canada Cup between 2006 and 2008.

Szabados served as an alternate for Team Canada at the 2008 IIHF World Women's Championships, and was named to the roster in 2009, but did not play.
In 2009, Szabados represented Canada at the 4 Nations Cup, where she played in the gold medal game and recorded a 5–1 victory over the United States.

Szabados was expected to be Canada's third goalie heading into the 2010 Winter Olympics, behind veterans Kim St. Pierre and Charline Labonté.
In pre-tournament play, including a series of games against midget boys teams from Alberta, Szabados posted the best numbers of the three.
 Her record against the midget boys was 10–1, with a 1.99 goals against average and .936 save percentage.
She also posted three wins against the American women's team leading up to the Olympics, including the 4 Nations Cup.

She was a member of the 2009–10 Hockey Canada national women's team which won the gold medal at the 2010 Winter Olympics and earned two shutouts, including the final game against the United States women's national ice hockey team.
She was selected to the tournament all-star team at the Olympics, and was named top goaltender.
In a March 31, 2012 exhibition game versus the United States, Szabados made 24 saves in a 1–0 shutout win at the Ottawa Civic Centre.

During the 2014 Winter Olympics in Sochi, Russia, Szabados was a member of the Canadian women's hockey team again.
She would win all three of her starts, including the gold medal game in overtime to win her second straight Olympic gold medal.

In the 2018 Winter Olympics Szabados was again in goal for the gold medal game against Team USA.
Tied after regulation and an overtime period, the game went into shootout, which Canada lost to the U.S. who won the gold.
The loss ended the team's streak of four consecutive gold medals won since 2002.
Szabados was the tournament's leading goaltender with a 94.94% save percentage and was awarded tournament's Best Goaltender.
Szabados has represented Canada internationally at the Under-22 and Senior levels.  she made her Team Canada debut in 2006, helping Canada to a gold medal at the 2006 4 Nations Cup, held in Kitchener, Ontario. In the opening game of the tournament, Szabados recorded a 3–0 shutout against the United States. Szabados also made her debut with Canada's Under-22 women's team in 2006.  She won three straight gold medals at the Air Canada Cup between 2006 and 2008.
Szabados served as an alternate for Team Canada at the 2008 IIHF World Women's Championships, and was named to the roster in 2009, but did not play. In 2009, Szabados represented Canada at the 4 Nations Cup, where she played in the gold medal game and recorded a 5–1 victory over the United States.
Szabados was expected to be Canada's third goalie heading into the 2010 Winter Olympics, behind veterans Kim St. Pierre and Charline Labonté. In pre-tournament play, including a series of games against midget boys teams from Alberta, Szabados posted the best numbers of the three.  Her record against the midget boys was 10–1, with a 1.99 goals against average and .936 save percentage. She also posted three wins against the American women's team leading up to the Olympics, including the 4 Nations Cup.
She was a member of the 2009–10 Hockey Canada national women's team which won the gold medal at the 2010 Winter Olympics and earned two shutouts, including the final game against the United States women's national ice hockey team. She was selected to the tournament all-star team at the Olympics, and was named top goaltender. In a March 31, 2012 exhibition game versus the United States, Szabados made 24 saves in a 1–0 shutout win at the Ottawa Civic Centre.
During the 2014 Winter Olympics in Sochi, Russia, Szabados was a member of the Canadian women's hockey team again. She would win all three of her starts, including the gold medal game in overtime to win her second straight Olympic gold medal.
In the 2018 Winter Olympics Szabados was again in goal for the gold medal game against Team USA. Tied after regulation and an overtime period, the game went into shootout, which Canada lost to the U.S. who won the gold. The loss ended the team's streak of four consecutive gold medals won since 2002. Szabados was the tournament's leading goaltender with a 94.94% save percentage and was awarded tournament's Best Goaltender.
Shannon Szabados