Teams can challenge a call as much as they like, every time they are wrong, they lose an out in their ABs or the opponent gets an extra out for their AB in the following inning.
If they challenge in the Top of the 4th, if it is the 3rd out, in the Bottom of the 4th the home team gets 4 outs. If they do it during the 1st or 2nd out, they lose an out if they are wrong.
If they challenge in the Top of the 4th, if it is the 3rd out, in the Bottom of the 4th the home team gets 4 outs. If they do it during the 1st or 2nd out, they lose an out if they are wrong.