|Ordered||6 Nov 1943|
|Laid down||30 Jun 1944||F Schichau GmbH, Danzig (werk 1649)|
|Launched||15 Aug 1944|
|Commissioned||23 Sep 1944||Kptlt. Karl-Hartwig Siebold|
|Successes||No ships sunk or damaged|
Scuttled on 2 May, 1945 at Wilhelmshaven. Wreck broken up.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-3504 did not suffer any casualties (we know of) until the time of her loss.