R3-D3 was an R3-series astromech droid assigned to the maintenance of the StarSpeeder 3000 line of ships. R3 series astromechs were usually not used in sockets of craft as navigators due to their limited five coordinate memory. R3-D3 is seen inside of the Droid Repair Center most likely awaiting repairs or waiting to see active service in repairing a Starspeeder.