RC3, or variants may refer to:
RC3: River City Cycling Classic, an cycling omnium in Eastern Washington, United States. RC3: precision running fits, a class of engineering fit used in the United States Republic RC-3 Seabee, an amphibious sports aircraft SJ Rc3, a model of SJ Rc class electric locomotive used in Sweden State Highway RC-3 (Puducherry), a state highway in Puducherry, India; see List of state highways in Puducherry RC3, one of six RC algorithms, symmetric-key encryption algorithms invented by Ron Rivesta rC3 (Remote Chaos Experience), remote events of the Chaos Communication Congress in 2020 and 2021 RC3 or Reginald Cornelius III, a fictional character in Knight Rider (season 4) Roberto Carlos, Brazilian former professional footballer
See also Release candidate, a software release version with potential to be a stable product RC (disambiguation) R3 (disambiguation) C3 (disambiguation)