 Guzmics gained notoriety in his international career against an ill-fated match against arch-rivals Romania, when in the second minute his defensive fumble allowed Ciprian Marica to score an early goal - the match would end with 3–0, with Guzmics being universally blamed for it, a blame he accepted.On 7 September 2015, Guzmics scored his first goal for Hungary in a 1–1 draw against Northern Ireland at the Windsor Park, in Belfast, Northern Ireland.After his performance against Norway, he was selected as one of the best defenders of the playoffs.