“We’re preparing for the worst,” said Scott Scholes, the associate vice president for enrollment management.

As colleges across the country, including prestigious universities like the University of California, Berkeley, second-tier state universities and little-known private institutions, look to make up for budget cuts and declining enrollment by accepting more foreign students, the situation at Idaho State is a cautionary tale, an example of the complexities of integrating foreign students into a campus and a community.

By some estimates, the one million international students in the United States generate a $30.5 billion boost to the economy. The largest group comes from China, but Saudi Arabia, the fourth-largest country of origin, supplies more than 70,000 students to schools like Arizona State, Western Kentucky, Cleveland State and Southern Illinois.

Some of these institutions are particularly concerned about the impact of a recent announcement by the King Abdullah Scholarship Program, which supports most of the students from Saudi Arabia. The program is facing “deep funding cuts,” according to Moody’s Investors Service, which said the scholarships would be limited to the top 100 American schools, an Academic Ranking of World Universities list that does not include Idaho State.

The Saudi Arabian Cultural Mission to the United States, which administers the scholarship program, did not respond to requests for comment.

Mr. Scholes said new limits established by the Saudi and Kuwaiti governments might mean that no Middle Eastern freshmen will be arriving at Idaho State for the next academic year, cutting enrollment by more than 250, on top of the 100 Saudi students who have already departed.