Élise Marcotte competed in her second consecutive Olympic Games in 2012 and finished in fourth place in the duet competition with partner Marie-Pier Boudreau Gagnon and in fourth place in the team competition. Marcotte announced her retirement after the London Games.
In 2011, she was a double gold medallist at the Pan American Games in Guadalajara in the team event and in the duet event with partner Marie-Pier Boudreau Gagnon, qualifying spots in both events for Canada for London. Marcotte and the team would also finish fourth that year in both events at the FINA World Aquatic Championships.
At the 2010 Commonwealth Games, Marcotte captured gold in the duet event as an alternate. At the FINA World Cup she would go on to capture a bronze in the team event.
In 2009, Marcotte and the team would finish just off the podium in the team events and the duet event finishing fourth and sixth respectively at the FINA World Aquatic Championships.
Marcotte made her Olympic Games debut in 2008 and finished fourth in the team event.
At the 2007 FINA World Aquatic Championships, the synchro team would finish sixth in both team events. Marcotte and the team would bounce back at the Pan American Games by placing second in the team event.
In 2005, Marcotte won gold and silver at the Pan American Championships in the team and duet events, respectively.
Marcotte has been a senior national team member since 2006.