There was no guarantee that after so long an absence, there would be anything fresh to say about Men in Black. Yet behold, it is good.
—Lisa Schwarzbaum Entertainment Weekly
A crisp and funny three-quel that's a much better send-off for these characters than the 2002 follow-up.
—Richard Roeper ReelzChannel
A decade after Part Two, the MiB franchise recovers the original's magic.
—John DeFore Hollywood Reporter
Although the story still gracelessly knocks around a bit...offers some satisfactions that the average blockbuster rarely even bothers to imagine.
—Glenn Kenny MSN Movies
Pic does betray a few saggy, sloppy edges...[but] newcomer Josh Brolin's quietly hilarious performance should give it a decent shot.
—Andrew Barker Variety
For a very belated, obscenely expensive second sequel that perhaps nobody...was clamoring for, Men in Black 3 is a reasonably crowd-pleasing and painless experience.
—Lou Lumenick New York Post
The good news is that it's better than the second Men in Black. The bad news is: not all that much.
—Bill Goodykoontz Arizona Republic
About as good as one could hope for from an unnecessary sequel that's a decade late to the party.
—Ty Burr Boston Globe
[Just like Agent K] we're all too old for this sort of thing — the shtick itself has gotten old, and it has not aged well.
—Christy Lemire Associated Press
Despite such ubiquitous timidity, one can pluck out a few pleasing distractions here.
—Nick Pinkerton Village Voice