nonperformance

noun
non·​per·​for·​mance | \ ˌnän-pər-ˈfȯr-mən(t)s How to pronounce nonperformance (audio) , -pə-\

Definition of nonperformance

: neglect or failure to perform especially : failure to adhere to the terms of an agreement or promise nonperformance of an obligation nonperformance of a contract