The Lancia 3Ro (100/17) is a Italian tank destroyer. It was introduced in Update "Danger Zone".

This gun truck is a heavy 4×2 Lancia mounting the Obice da 100/17 model 1916 or Obice da 100/17 model 1914 howitzers. The Lancia 3Ro was picked simply because of its availability in military workshops in the Italian colony of Libya when Italian generals noted the urgent need for a quick armed vehicle to fight in the open terrain of the Desert. These workshops started converting a small batch of these vehicles to help satisfy this demand.

The models of the guns it carried (100/17) and the name of the truck (Lancia 3Ro) is what the Italian army based this SPGs name off. Several similar makeshift gun-mounted Lancia 3Ro's were built, but the models with 100/17 howitzers were among the most capable. Though the Lancia 3Ro was initially planned to be a repair and recon vehicle, equipment with these howitzers led to surprising performances in the anti-tank role.