(3)Within 10 days after the close of pleadings, each party shall disclose by letter to all parties adverse in interest and shall produce for inspection, if requested, any insurance policy under which an insurer may be liable to satisfy part or all of any judgment which may be obtained in the action, or to indemnify or reimburse any party for money paid by him in satisfaction of the judgment, but information concerning such insurance policy shall not be admissible in evidence at the trial unless it is relevant to an issue in the action.