Most students cannot be suspended from school for more than 10 days unless there is a meeting before the suspension.
If the school decides that the student needs to be suspended from school for more than 10 days because the student did something severe enough to warrant the more than 10 days suspension then yes the student can then be suspended for more than 10 days.
Usually a suspension does not last any longer than 10 days but they can in some rare and special circumstances.
I've known a few kids who were suspended longer than 10 days but first a meeting had to be held to extend the suspension of the student.
The general rule for school suspensions is that a student with an IEP or a 504 plan cannot be suspended longer than 10 days in a single school year without an IEP team meeting.