The only real way to be kicked out is to absence out. Any other issues that come up (e.g., violations of guidelines, suicidal behavior, self-harm behavior, treatment interfering behaviors, etc.) will be worked on with your therapist with the goal of helping you not absence out. Behaviors that occur in group that are destructive or make the environment unsafe for other clients or the leaders may result in your not being allowed back in group until a plan has been created to prevent the behaviors from recurring. As long as that plan is in place without your missing three groups in a row, you will not be discharged.