A condition of disorientation affecting someone who is suddenly exposed to an unfamiliar culture or way of life or set of attitudes WordNet 3.0 & Open English WordNet

Culture shock is an experience a person may have when one moves to a cultural environment which is different from one's own; it is also the personal disorientation a person may feel when experiencing an unfamiliar way of life due to immigration or a visit to a new country, a move between social environments, or simply transition to another type of life. Wikipedia

Feeling of anxiety when operating within a different culture. Wikipedia Disambiguation

Experience one may have when moving to a cultural environment which is different from one's own Wikidata

A state of anxious confusion experienced by someone exposed to an alien or unfamiliar environment. Wiktionary

State of anxious confusion. Wiktionary (translation)