unrelated; irrelevant; having no connection — indicates no relation or relevance between things.
その話は今の議題とは関係がない。
That topic is unrelated to the current agenda.
彼の意見はこの問題とは関係がないと思う。
I think his opinion is irrelevant to this issue.
個人的な事情は仕事と関係がないと説明した。
He explained that personal matters have nothing to do with work.