Soviet submarine K-3
Soviet submarine K-3 may refer to one of the following submarines of the Soviet Navy:
- {{ship|Soviet submarine|K-3|1938}}, a K-class submarine sunk by German vessels in March 1943
- {{ship|Soviet submarine|K-3 Leninsky Komsomol}}, a {{sclass2|November|submarine|0}} (or Project 627) submarine; the first nuclear submarine of the Soviet Union which suffered a fire in the Mediterranean in September 1967, now on display in Kronstadt
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