There can be a number of reasons why a university student has been either asked to leave a course or been excluded from one. Universities must have a certain procedure to follow when excluding a student, if you have been excluded it may be to do with requirements of your course, maybe you have failed an examination or a part of the course, or it could be to do with your behaviour as a student. If a student feels they have been unfairly withdrawn from a course, they have the right to appeal the decision and present their case to the university.
Common examples of this include when a student has been withdrawn from their course as a result of waiting on their PhD supervisor for information. PhD students have a lot at stake when dealing with these kinds of cases because they have come to the point where they have decided on a career choice and put considerable financial investment into their studies. If the reason for exclusion is out of the student’s control, for example if they are waiting on information they need to complete their research from their supervisor, a claim can be made.