Though often self-centered and conniving, Greg remains a likable kid, and the movie entertains by pulling off over-the-top scenarios that set up digestible life lessons for youngsters.
—Abby West Entertainment Weekly
The third installment in the Wimpy Kid franchise turns out to be not so wimpy after all.
—Michael Rechtshaffen The Hollywood Reporter
Diary of a Wimpy Kid: Dog Days is probably the most inoffensive kid's film you're likely to see this summer. And that's a good thing.
—Marc Savlov Austin Chronicle
Genial and pleasant to a fault, the film could benefit from a little more personality.
—Nathan Rabin The A.V. Club
Formulaic in adhering to the sitcom-style tone of the first two films, picture finds the chronically underappreciated Greg facing a summer break replete with parental expectations and anxiety over his first crush.
—Lael Loewenstein Variety
Childminders rejoice: the formulaic but family-friendly series is back and it’s business as usual.
—James Mottram Total Film
It's not great, but the mean-spiritedness that permeated the first film and stuck around a bit for the second is mostly gone.
—Bill Goodykoontz Arizona Republic
Hardly groundbreaking but plenty of fun for its target audience.
—Anna Smith Empire
A half-hearted morality tale about taking responsibility for your actions as a sign of impending maturity.
—Andrew Schenker Slant Magazine
Why are the Diary of a Wimpy Kid movies so much less fun, and funny, than the best of the books created by Jeff Kinney?
—Michael Phillips Chicago Tribune