In February 2012, Parrish returned to her stage roots in a production of the musical "Spring Awakening". She portrayed Anna, while also understudying the lead female role of Wendla Bergmann. That same year, she had a supporting role in the romantic comedy-drama film "Celeste and Jesse Forever". She subsequently guest starred in the CBS drama series "Hawaii Five-0", playing the role of Rebecca Fine, an ambitious and strong-willed chemistry student, and made a guest appearance in Lifetime's fantasy legal drama series "Drop Dead Diva" as cheerleader Chelsea Putnam. Also in 2014, Parrish led the cast of the Lifetime thriller film "High School Possession" as Lauren Brady. The following year, she had a guest role as villainess Jillian Havemeyer in NBC's comedy-drama series "The Mysteries of Laura". In 2017, she guest starred in Fox's procedural drama series "Rosewood", playing Selena Monet, a young popstar. In November 2017, Parrish began portraying Sandy Dumbrowski in a Toronto production of "Grease", alongside Katie Findlay. She then portrayed Lisa Wagner in the romance film "Until We Meet Again", alongside Jackson Rathbone.