- "This is a repair part for a B3. Whatever happened here, it's recent."
- ―Quinlan Vos
B3 battle droids were battle droids manufactured by Baktoid Combat Automata and used by the Confederacy of Independent Systems during the Clone Wars. B2-series super battle droids and B3 battle droids were favored over the expensive and complex E522 assassin droids. At one point, at least one was stationed near a listening post on the planet Vanqor. A curved piece of metal used in B3 repair was uncovered by Quinlan Vos when he and a Republic strike team attacked the listening post.
- Dark Disciple (First appearance, simultaneous with Dark Disciple audiobook) (Parts only)
- Dark Disciple audiobook
- Aftermath (Parts only)
- Aftermath audiobook (Parts only)
- Cyphers and Masks (First identified as B3 battle droid)