Dimithra was born in Columbo, Sri Lanka. She grew up in St. Albert, Alberta, and went to medical school at the University of Alberta. Her family practice residency was at St. Paul’s Hospital in Downtown Vancouver. She has a full-service Family Practice in East Vancouver in a Community Health Centre run by Vancouver Coastal Health. She was instrumental in founding the Youth Pregnancy and Parenting Program (YPPP), a maternity clinic for pregnancy and parenting youth and teens and has worked in the YPPP clinic since 2004.
She is also fluent in Sinhalese. She loves to travel, cook, kayak, spend time with her 2 young daughters, and volunteers as a girl guide leader.