Marois began competing for the senior Canadian national artistic gymnastics team in 2017. That same year, she finished in first place on the balance beam at the Pan American Championships.[1]
At the 2018 Pacific Rim Championships, Marois won a silver medal with the Canadian team. Then in the vault final, she won the bronze medal behind Jordan Chiles and Grace McCallum.[2] She was part of the Canadian team at the 2018 World Championships.[3] Marois had been named to the team as a reserve, but was called in to compete after Laurie Dénommée injured her ankle days before the competition.[4] The team finished the competition in fourth place, which at the time was the best finish for the Canadian women's artistic gymnastics program.[3][5]
At the 2019 Guimaraes World Challenge Cup, Marois won bronze medals on both the vault and balance beam.[6][7] She also competed in the uneven bars final but finished eighth after falling.[8] She also won a vault bronze medal at the 2019 Elite Gym Massilia.[9] She won a bronze medal with the Canadian team at the 2020 International Gymnix, and individually, she won the vault silver medal behind MyKayla Skinner.[10] She qualified for the vault final at the 2020 Baku World Cup,[11] but the apparatus finals were canceled due to the outbreak of the COVID-19 pandemic in Azerbaijan.[12]
Marois won the vault bronze medal at the 2021 Canadian Championships and placed tenth in the all-around.[13] The final competition of her career was the 2022 Koper World Challenge Cup,[14] where she finished sixth in the balance beam final.[15]
Canada 
