The first DLC, Awakening, released on PS4 in February while Xbox One and PC received the DLC earlier this month.
Despite Black Ops III players on last-gen consoles being told not to expect any post-launch content, Activision announced yesterday that Awakening would release for PS3 on April 5. There was no word on whether or not the DLC would also be released on Xbox 360 and with no PS3 season pass, the content will cost the usual $14.99.
Each DLC pack is guaranteed to contain at least four multiplayer maps and one zombie map. The packs cost $14.99 each, but are also included in the $50 season pass.