When R3 is on third base and R1 attempts to steal second, what happens if the batter interferes with the catcher's throw but the catcher completes the out at second?

In this scenario, when the batter interferes with the catcher's throw while R1 is attempting to steal second, the important factor to consider is the outcome of the play in relation to the interference. Since the catcher successfully completes the out at second base, it indicates that the play progressed and the defense executed a successful play despite the batter's interference.

The rule allows for the interference to be ignored when there is a successful defensive play resulting in an out. Therefore, the run scored by R3 still counts because the interference did not prevent the play from being resolved and the out was made. The focus here should be on the natural outcome of the play, allowing R3's run to stand, making it the correct conclusion in this situation.

The presence of interference does not negate the run if the defensive team is able to successfully execute the play. Thus, the batter's interference is handled in a way that does not affect the validity of the run scored by R3, as the attractive outcome of the play (getting R1 out) occurred. This understanding of interference in conjunction with successful defensive actions highlights why the given answer is the most accurate.