Singmuang competed on the uneven bars at the 2015 European Championships, but she did not qualify for the event final. She won the uneven bars gold medal at the 2015 Swedish Championships. At the Belgium-Sweden-Austria Friendly, the Swedish team finished 2nd, and Singmuang won the bronze medal on the balance beam. She then competed at the 2015 World Championships with Ece Ayan, Stina Lovisa Estberg, Emma Larsson, Veronica Wagner, and Marcela Torres, and the team finished 22nd.