Iowa Rule of Criminal Procedure 2.8(2)(b) provides in relevant part:
     Before accepting a plea of guilty, the court must address the defendant
personally in open court and inform the defendant of, and determine that the
defendant understands, the following:
     . . .
     (3) That a criminal conviction, deferred judgment,  [*5]  or deferred
sentence may affect a defendant's status under federal immigration laws.