The FNRS-3 or FNRS III is a bathyscaphe of the French Navy. It is currently presevered at Toulon. She set world depth records, competing against a more refined version of her design, the first Bathyscaphe Trieste. The French Navy eventually replaced her with the bathyscaphe FNRS-4, in the 1960s. After damage to the FNRS-2 during its sea trials in 1948, FNRS ran out of funding, and the submersible was sold to the French Navy, in 1950. She was subsequently substantially rebuilt and improved at Toulon naval base, and renamed FNRS-3. She was relaunched in 1953, under the command of Georges Houot.