Idaho Fam. Law. P. 806
As amended through September 11, 2024
Unless justice requires otherwise, no error in admitting or excluding evidence, or any other error by the court or a party, is grounds for granting a new trial, for setting aside a verdict, or for vacating, modifying, or otherwise disturbing a judgment or order. At every stage of the proceeding, the court must disregard all errors and defects that do not affect any party's substantial rights.
Id. Fam. Law. P. 806