Guardianship is a legal relationship created when a court determines that a person is incapable of making sound decisions in important areas that affect the person due to incapacity, including intellectual disability or developmental disability (ID/DD). A guardian is given authority to make decisions for the person in some or all areas of the person’s life. This entry describes the guardianship process, the trend toward “limited” guardianship, and some common alternatives to guardianship, including supported decision- making (SDM).