disaffiliation
🇺🇸
/ˌdɪsəfɪliˈeɪʃn/
🇬🇧
/ˌdɪsəfɪliˈeɪʃn/
The process of formally leaving or being removed from a group or organization.
After years of disagreement, the local chapter decided to pursue disaffiliation from the national body.