R3-S3 was an R-series astromech droid created by Industrial Automaton. It was purchased by Bruce Jammer in 25 BBY from an unknown vendor. It served as Jammer's personal astromech droid. It had masculine programming and had a clear dome with green and blue body paint. After being sentenced to serve the Jedi Order Bruce Jammer allowed Jedi Knight Scott Borek to borrow it for flights to and from planets. The Jedi and the droid developed a small bond. It continued to serve Borek and played a role in the final battle between the Republic and another faction, by gunning down five fighters and Phyllius Marks' Cruiser. It continued to serve Jammer until sometime around 21 BBY when it was given to Scott Borek as a gift. It had stayed with Borek since then.