irretrievable breakdown of the marriage

ir·​re·​triev·​able break·​down of the marriage

ˌir-rə-ˈtrē-və-bəl-

: a broad ground for divorce that is predicated on the development of incompatibility between marriage partners and that is used in many states as the sole ground of no-fault divorce

called also irremediable breakdown of the marriage, irretrievable breakdown

compare irreconcilable differences