be none of someone's business

US /bi nʌn əv ˈsʌm.wʌnz ˈbɪz.nɪs/
UK /bi nʌn əv ˈsʌm.wʌnz ˈbɪz.nɪs/
"be none of someone's business" picture
1.

jemanden nichts angehen, nicht jemandes Sache sein

to not be something that someone should be involved in or know about; to not concern someone

:
What I do in my free time is none of your business.
Was ich in meiner Freizeit mache, geht dich nichts an.
Whether they get married or not is none of our business.
Ob sie heiraten oder nicht, geht uns nichts an.