User blog comment:GeorgePowell/If I chose to continue playing on ME2, am I able to transfer my file to ME 3/@comment-1221773-20110706174624/@comment-98.247.207.34-20110710202619

Because all they will check is if you have a saved game. Saves that are after the endgame do not matter, as long as the game is finished, it will be importable. This was meant to compensate for the LotSB and Arrival DLC's, which are generally meant to happen after the suicide mission. Any decisions made in those DLC's will be imported into ME3 as long as they are on the save file.