From Longman Dictionary of Contemporary Englishthrough no fault of her/my etc ownthrough no fault of her/my etc ownFAULT/BE somebody'S FAULTused to say that something bad that happened to someone was not caused by them Through no fault of our own we are currently two players short. → fault
Examples from the Corpus
through no fault of her/my etc own• In my opinion Anna acted more childishly but through no fault of her own.• So, through no fault of my own, I was at a loose end quite a bit. 