International play has further bolstered Bouwmeester's reputation. He has represented Canada in 11 tournaments. He made three straight appearances in the IIHF World Junior Championship from 2000 to 2002, played in the IIHF World Championship four times between 2003 and 2012, and twice in the World Cup of Hockey (2004, 2016) and the Olympics (2006, 2014). He was a reserve for Canada at the 2010 Vancouver Olympics.
Bouwmeester has won five gold medals at those events, at the World Championship in 2003 and 2004, the World Cup in 2004 and 2016, and the 2014 Sochi Olympics. The underlying numbers throughout his career confirm his reputation of being a steady hand against elite competition. As new statistics have been introduced for defensemen, Bouwmeester has become one of the prototypes of what it means to handle tough minutes. Throughout his career he has been assigned a lot of ice time at even strength and while killing penalties, against top opponents, and in the attacking and defending zones.
The toughest minutes involve playing shorthanded against the game's best offensive players, but that's Bouwmeester's specialty.
Since Bouwmeester was acquired by the Blues in a trade with the Calgary Flames on April 1, 2013, the Blues have a League-leading penalty-killing percentage of 85.3.
Bouwmeester has played 3,439:14 killing penalties during his NHL career, which ranks No. 8 among defensemen since the information was first recorded in 1997-98. On a per-game basis, his average of 3:26 per game is third among active defensemen to play at least 500 games, behind Zdeno Chara of the Boston Bruins (3:34) and Francois Beauchemin of the Colorado Avalanche (3:27).