SR 3 may refer to:
SR-3 Vikhr, a Russian assault rifle SR-3 Blackstar, the first stage of a reported American covert spaceplane program Matich SR3, an Australian sports car Radical SR3, an English sports car Saints Row: The Third, a video game Szekely SR-3, an aircraft engine State Road 3 or State Route 3; see List of highways numbered 3 The third iteration of Solar Roadways' panels, and the first to be publicly installed VR Class Sr3, a Finnish electric locomotive SR3 (album), an album by K.O