persona non grata
Literal translation: unwelcome person
In an English sentence: The State Department declared the accused spy to be a persona non grata.
A country can designate a visitor as a persona non grata for any number of reasons including suspected terrorist activities or criminal charges lodged in the person’s own country. A person who has been declared a persona non grata must leave the country immediately.
From Elizabeth Heimbach's book Latin Everywhere, Everyday