R3-D5 is similar in appearance to any other astromech droid. R3-D5 features green legs and a green body with printing similar to that of R8-B7 except in white. The dome is metallic silver with mostly green printing.
R3-D5 was an R3 series astromech droid that was in service during the Clone Wars. He was known have to co-piloted Saesee Tiin's Delta 7-B Jedi Starfighter on at least one occasion, in a battle above the planet Lola Sayu.