The HMS Flamingo (U-03) is a Black Swan-class frigate. It was laid down by the Yarrow Shipbuilding Company, Limited, at Scotstoun in Glasgow on May 26, 1938, and launched on April 18, 1939. It was completed on November 3, 1939 and commissioned on December 3, 1939.

The HMS Flamingo was sold to West Germany on January 1959; it was renamed to Graf Spee.