When can I play the Mass Effect 3 DLCs if I've already beaten the game?

I want to get and play the Mass Effect 3 DLCs, but I've already beaten the game and don't want to do another playthrough just for the DLCs. Can I still play the DLCs?

If I recall, ME3 has a few auto-saves that it keeps, so I should have one right before the final mission(s) of the game? Could I simply use one of those for the DLCs, or are there certain points for each DLC where after that point, you can't activate them anymore?

Solution 1:

You can play all DLC before the assault on the Cerberus base, which is the point of no return. The game does keep an autosave from just before starting that mission.