Mallet began her season on the Challenger Series (CS), placing seventh at the 2014 Nebelhorn Trophy, and then finished tenth at two Grand Prix events, the 2014 Skate Canada International and 2014 Trophée Éric Bompard. After winning the bronze medal at the 2015 Canadian Championships, Mallet was selected to compete at the 2015 Four Continents Championships. She placed thirteenth in the short program, fourteenth in the free skate, and fourteenth overall.