A rule that when literal compliance is impossible the intention of a donor or testator should be carried out as nearly as possible WordNet 3.0 & Open English WordNet

The cy-près doctrine is a legal doctrine which allows a court to amend a legal document to enforce it "as near as possible" to the original intent of the instrument, in situations where it becomes impossible, impracticable, or illegal to enforce it under its original terms. Wikipedia

legal doctrine allowing legal documents to be enforced "as near as possible" Wikidata

In the law governing charitable trusts, the doctrine that a court may direct the funds of the trust to a best alternative, to be chosen when the original beneficiary is no longer a choice. Wiktionary