全然関係ない

completely unrelated

→ 全然
phrase Rare #43,115
completely unrelated Used to say that something has nothing to do with someone or something. In casual speech, 全然 can also be used with affirmative expressions, but here it emphasizes the negative 関係ない.
JA: その話は私には全然関係ない。
EN: That matter has nothing to do with me.

それは君と全然関係ない。

That has absolutely nothing to do with you.

ちょっと全然関係ないこと聞いてもいい?

Can I ask you something completely unrelated?

ところが全然関係ないんだな

But it turns out it has nothing to do with it at all.

— High and Low (1963)

君には全然関係ないでしょ!

It's got nothing to do with you!