This longitudinal study examined the effects of a mandatory counseling program for students placed on academic probation at a university in South Korea. The study compared longitudinal changes over three semesters in the grade point average (GPA) of students who were on academic probation. Two groups, 46 students with mandatory counseling and 49 students without, were used as comparison groups for testing the effects of counseling intervention on GPA improvement. The result suggested that the students who attended five or more counseling sessions beyond two mandatory sessions showed a significantly greater GPA improvement over three semesters in comparison with the students who did not receive the mandatory counseling sessions. Implications for counseling and suggestions for institutional action are discussed.