User blog comment:OmegaSpruz/The Suicide Mission Over But the result/@comment-730941-20100723114704

Oh. I don't think so - the DLC for the original Mass Effect didn't affect ME2 at all, except for an extra email.

Not having the ME2 DLC will not affect ME3 (or if it does, they will be small things). You'll still be able to transfer your character over to the third game.