unaffiliatedadjective
uk/ˌʌn.əˈfɪl.i.eɪ.tɪd//ˌʌn.əˈfɪl.i.eɪ.t̬ɪd/not connected with or controlled by a group or organization:
The man who helped him was unaffiliated with the church.
US used to refer to people who do not state that they support a particular political party when they register to vote:
Of the district's 476,535 registered voters, 39% are Republicans, 34% are unaffiliated and 27 % are Democrats.
Compare
affiliated