Public Senior High School 3 Padang (Indonesian: SMA Negeri 3 Padang), also known as SMANTRI, is one of public senior high school in Padang, West Sumatra, Indonesia. It is located at Gajah Mada Street, Gunung Pangilun, North Padang.Similar to all high schools in Indonesia, during the school education in SMA Negeri 3 Padang taken within three years of lessons, ranging from 10th Grade to 12th Grade.