untimely

Synonyms: a bit previous abortive anachronistic awkward badly timed bright and early disagreeable early early bird early on ill-timed improper inauspicious inconvenient inexpedient inopportune intrusive malapropos mistimed out-of-date overearly oversoon premature previous soon too early too late undue unfavorable unfit unfortunate unlucky unpropitious unseasonable unseemly unsuitable unsuited wrong

Antonyms: appropriate opportune timely