Puustinen has represented Finland in four European Curling Championships. She was an alternate at her first European Championships in 2005. She didn't play in any games, and the team placed 10th. She played in 2011 European Curling Championships as fourth player with Heidi Hossi, and Eszter Juhász team skipped by Oona Kauste, and placed 12th (8-1 in the B Division). The team returned to the Euros at the 2013 European Curling Championships, with new lead Marjo Hipp. The team finished in 11th place, winning the B Division, and promoting Finland to the A Division of the 2014 European Curling Championships. There, Puustinen led her rink to a 5–4 record, and a 6th-place finish. This qualified Finland for the 2015 World Women's Curling Championship.