If the staff do not turn up nor did he inform his superior after the 3rd consecutive day, when or should he return to work on the 4th day (the safest day), tell him to go back home and wait for HR instruction (No need to suspend him and pay him half pay). Then your HR can issue him with a show cause asking him to explain why he was absent. If the explaination is not acceptable, then your HR can hold a DI against him and dismiss him under Sec 15(2).
If he is a problematic staff, dont bother to call him. Anyway it is not the employer obligation to call the employee.
This is how I handle absent cases.