This paper explores the influences of international students’ beliefs of how their compatriots are assessed by host nationals (i.e. metastereotypes). Modified labeling theory was employed to predict how international students’ metastereotypes are associated with their self-disclosure, loneliness, and depression. One hundred and forty-six international students in Japan were asked to rate their metastereotypes, amount of self-disclosure, loneliness, and depression. The results displayed that metastereotypes were positively associated with the amount of self-disclosure and negatively associated with loneliness and depression. A structural equation model further pointed out that metastereotypes were indirectly associated with depression through loneliness. Theoretical and practical contributions are considered.