What rule of evidence would an attorney break if he or she were to ask a question that did not pertain to the case?

An attorney would violate the rule of relevance under the rules of evidence if they asked a question that did not pertain to the case. This rule requires that all evidence and inquiries must be directly related to the issues at hand to ensure that the proceedings remain focused and fair. Asking irrelevant questions can lead to objections and may result in the judge excluding that testimony from consideration.