I actually am open to more than one primary round with a reduced field but I always wonder how much the WR would grow annoyed at more than two ballots. Possibly it wouldn't be a guaranteed round. Like it would only happen if more than two candidates got over 15-20% of the vote. Last year, the 3rd highest candidate only got 12.5 though. I think this year actually has more active campaigns. Last year had a handful of super active ones. This year has a wide range of active ones so I don't know how that translates to next round. Could actually be far more close every vote will matter for a campaign.
Also, Round 3 is a about a week long, not a day. My assumption was you meant round instead of day though when you said that.