Not related; having no connection or relevance to something.
その事件は私の仕事とは無関係だ。
That incident is unrelated to my work.
個人的な意見は今回の決定とは無関係に扱われた。
Personal opinions were treated as unrelated to this decision.
無関係な人を巻き込まないでください。
Please don't involve people who are unrelated.