Code 3 may refer to:
Code 3 Collectibles, a scale model company Code 3 Response, a response mode for emergency vehicles Code-3 temporal pattern, a distinct evacuation tone pattern used primarily in fire alarms Code 3 (film), a 2025 film starring Rainn Wilson Code 3 (TV series), 1957 TV series produced at Hal Roach Studios Code 3 in sailing: see spinnaker Code 3, a documentary TV series following firefighters, hosted by Gil Gerard