From Longman Dictionary of Contemporary Englishbarringbar‧ring /ˈbɑːrɪŋ/ prepositionIFunless something happens
Barring a miracle, he won’t walk again.Examples from the Corpusbarring• Barring power outages, the only use for candles is decorative.• Barringunexpecteddelays, work on the tunnel should be completed by the end of next month.