"Sickle" departed Algiers to patrol off southern France on 10 May 1943. After five days at sea, she attacked a German convoy south of Nice, France, and sank the German submarine chaser "UJ-2213" which had been painted to appear like an oil tanker. The boat next attacked the with torpedoes on 20 May, but missed; "U-755" was sunk eight days later by aircraft. The next day, "Sickle" attacked the off Toulon and hit it with two torpedoes; "U-303" sank in half a minute. She then returned to Algiers on 25 May. After leaving on her next patrol on 16 June, "Sickle" unsuccessfully attacked an enemy submarine on 18 June, then returned to port on 1 July.