Foreign Surveillance Prevention Act of 1981

Foreign Surveillance Prevention Act of 1981 - Directs the President to take specified actions if the President has reason to believe that a person with diplomatic immunity is engaging in electronic surveillance in the United States for a foreign power.

Requires the President to inform Congress of the suspected electronic surveillance. Directs the President, unless it would compromise U.S. intelligence gathering, to: (1) inform the persons reasonably believed to be targets of such surveillance; (2) inform the representative of the foreign power and demand that the surveillance end; and (3) declare the person doing the surveillance, if the surveillance does not end within a specified time, to be person non grata in the United States and demand that such person leave the country.