From the AOE 19-20 register
Suspension – Students who have been temporarily dismissed from school for up to ten days. These absences are considered excused so the student isn’t counted as a truant. 
12 A student under an out-of  -school suspension will remain on the enrollment record and absences recorded for each of the days the student is not attending classes. 
13. A student who has been expelled from school will remain on the enrollment record and absences will be recorded for each of the days the student is not attending classes, except in the case where a school is providing educational services for the expelled student. In this case, the student will be recorded as in attendance but not in the building. If an expelled student enrolls in another school, he or she should be removed from the enrollment record with the appropriate exit code. If a previously expelled student does not return to school as expected and is absent for 10 consecutive school days the student is recorded as status unknown and counted as a dropout or summer dropout, whichever is most appropriate.
An absence is considered excusable when it is the result of:
•Personal illness; 
•Appointments with health professionals that cannot be made outside of the regular school day; 
•Observance of recognized religious holidays when the observance is required during a regular school day;
•Emergency family situations such as a death in the family; 
•Planned absences for personal or educational purposes which have been approved. 
•Absences due to suspension or expulsion
Suspension and expulsion.  A sending high school district is not required to provide services to a resident student during a period of suspension or expulsion imposed by another high school district.