prospective study-abroad student; person wanting to study abroad
Refers to someone who hopes or plans to study overseas; often used in educational or immigration contexts.
Prospective study-abroad students need to apply for a visa.
The university held an information session for those interested in studying abroad.
留学生 is a student who is already studying abroad, while 留学希望者 is someone who hopes or plans to do so.
Compound of 留学 (study abroad) + 希望 (hope, wish) + 者 (person).