Objective: Suicide ideation (SI) is prevalent among college students, and suicide disclosure (SD) is critical for crisis intervention. However, students with SI may worry about stigmatizing responses to their disclosure. To better understand the mechanism of stigmatizing responses to SD, we investigated the effects of a hypothetical classmate's SD on college students' emotions and reasoning when providing advice to a distressed classmate. Method: In a randomized controlled experiment, students wrote advice to a hypothetical classmate who recently failed in his pursuit of a romantic relationship with a peer. The experimental/control group also learned he wanted to either commit suicide/quit school. When typing the advice, participants' facial expressions were recorded and analyzed by Facereader7.1. After advising, participants reported their sadness, joy, fear, anger, surprise, and disgust when advising. Finally, trained coders coded the common themes of their advice and rated the wise reasoning involved. Additionally, two experts in suicide prevention rated the helpfulness of their advice for the classmate. Results: The experimental group showed significantly fewer facial expressions of happiness, reported higher sadness and fear, provided less helpful advice, and mentioned "confronting reality" less during advising. The difference in disgust and wise reasoning was nonsignificant. Conclusion: Learning of a classmate's SI may increase fear and sadness among recipients and reduce the helpfulness of their advice. Increased psychoeducation for students that focuses on improving emotional regulation (especially facial expressions) during SI may reduce the stigma surrounding SI and prevent perceived burden-someness among individuals with SI after SD.