disaffiliate

/ˌdɪsəˈfɪlieɪt/
verb
  1. To end an official connection or membership with an organization, group, or political party.
    • Several members decided to disaffiliate from the club when the leadership changed.
    • The local chapter voted to disaffiliate from the national organization after the policy dispute.
    • The union threatened to disaffiliate if the parent body did not address their concerns.
noun
  1. A person or group that has ended its official connection with a larger organization.
    • The disaffiliates formed their own independent association.
    • As a disaffiliate, she no longer had voting rights in the main committee.
    • The conference welcomed both current members and disaffiliates who wanted to rejoin.