3B3-10 was a B1 battle droid in the service of the Trade Federation. He was part of the Federation occupation force during the Invasion of Naboo, and fought a team of Royal Naboo Security Forces members during the Battle of Naboo. In the course of the engagement, his regiment commander was destroyed, and 3B3-10 took on the task of leading his fellow soldiers against the attackers. The entirety of the Federation's occupation force of Naboo was later deactivated when Anakin Skywalker destroyed the Droid Control Ship.