Super Saiyan 3 transformation not used in DBS due to massive Ki drain, explains why Vegeta opted out. Vegeta's growth seen in various transformations over the years, finally achieving Super Saiyan 3.

Dragon Ball DAIMA gave Vegeta a transformation that has eluded him for decades. Finally, he has achieved SSJ3, but how is it different from Goku's? Daima has been running for a few months now ...