The "Renault ZT3" was a tank destroyer with the same 25 mm gun in a superstructure on the hull. The development of the ZT 3 took place parallel to that of the ZT 2: a first plan in June 1935, followed by a request to Renault to produce a prototype on 12 December 1935. However, given the absence of a turret there was no need to wait for its development: Renault was instructed to quickly construct a first vehicle by adding a boiler plate superstructure to the old third AMR 35 prototype, and then sent it to Rueil where a gun could be built in and a cast commander cupola fitted.