Simple past tense and past participle of undelete.(verb)
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Use "undeleted" in a sentence
"The peril was pointedly illustrated when, during Obama's signing of his historic health-care reform legislation, a microphone picked up Biden telling him the passage was a big deal, with expletive undeleted."
"I told her that asking to delete photos was silly because they can be easily undeleted."
"Lloyd Blankfein and other Goldman executives were lambasted by lawmakers for "unbridled greed" in an often-electric daylong showdown between Wall Street and Congress -- with expletives frequently undeleted."