I have marked the DLC content for which I can find confirmation stating it is available on the Playstation 3 in italics - this doesn't mean that the others aren't available, just that I didn't find anything obvious stating they were. I have marked the DLC containing story content in bold. It is worth noting that many but not all of these DLCs do not influence the game story and are purely aesthetic, adding individual items or a group of upgrades/achievements. This leaves quite a few DLCs unaccounted for, and I'm not sure if all of them are available on the Playstation 3.

It looks like the Mass Effect Trilogy contains the following games