TZ-3 Dominator Droid was a Battle droid used by the Sith Empire during the Galactic War. In 3641 BBY the droid, along with DX-2 Dominator Droid and C2-N Dominator Droid was used to defend the approach to the Bastion in the Coronet City on Corellia, but was destroyed during the assault by the Galactic Republic forces.