If R3 scores during an improper batting situation, when does the run count?

In this scenario, the determination of whether the run counts hinges on the timing of the event and the rules regarding appeals in situations involving improper batting.

When R3 scores during an improper batting situation, the run will count if the improper batting was appealed and determined after the run was already considered earned before the appeal was made. This means that if B5 batted and R3 crossed home plate prior to any successful appeal of the improper batting, then the run is allowed to count.

The rules provide for the status of the run based on whether the situation was addressed in a timely manner. If an appeal is made before the run has been officially scored (meaning R3 had not yet crossed home plate), the run does not count, but if the appeal comes after the run is earned, it would count. This reflects the understanding of earned runs in baseball and the impact of appeals on scoring.