German submarine U-3519 was a Type XXI U-boat of the German Kriegsmarine during World War II. The Elektroboote submarine was laid down on 19 September 1944 at the Schichau-Werke yard at Danzig, launched on 23 November 1944, and commissioned on 6 January 1945 under the command of Kapitänleutnant Richard von Harpe.