absentee
//ˌæb.sənˈtiː//
Noun
absenteeSingular
absenteesPlural
1
A person who is expected to be present at a place but is not there.
The teacher noted the absentees in the attendance book.
2
A person who is habitually absent, especially from work or school.
The teacher kept a list of absentees who missed class frequently.