irrelevant

Synonyms: extraneous foreign garbage immaterial impertinent inapplicable inapposite inappropriate inappurtenant inapropos inapt inconsequent inconsequential insignificant not connected with not germane not pertaining to off the point off the topic out of order out of place outside pointless remote trivial unapt unconnected unimportant unnecessary unrelated without reference

Antonyms: appropriate necessary pertinent related relevant