Full-time non- EU/EEA students are required to attend a minimum of 15 hours of classes per week for a 25 week period to comply with conditions of the Internationalisation Register. Under this student visa program students are allowed to work a maximum of twenty hours per week whilst studying. During the academic holiday, they may work full-time.
Attendance is a provision of the student's visa and non-attendance may result in loss of permission to study and work in Ireland. Students’ attendance/non-attendance is monitored continuously throughout the year. The minimum attendance required by GNIB is 80%.
Irish Naturalisation &
Immigration Service Department of Justice and Equality
http://www.inis.gov.ie/