The RX-79BD-3 Blue Destiny Unit 3 is a variant to the RX-79(G) Gundam Ground Type. It first appeared in Mobile Suit Gundam Side Story. The unit was primary piloted by Yuu Kajima.

Built from the spare parts reserved for Blue Destiny Unit 1 and Unit 2, the Blue Destiny Unit 3 differs from its predecessors in a few ways. It retains the chest missiles, vulcans, and beam sabers from Unit 1, while giving Unit 3 a new backpack to operate in space. Unit 3 was also given the beam rifle primarily used by the RX-79［G］ Gundam Ground Type. Unit 3 and Unit 2 also differed in terms of color. While Unit 2 was painted in blue on dark blue color scheme, Unit 3 sported a more traditional blue on white paint scheme