Rogue Jedi, the event organiser, asked for the question to be deleted due to community disapproval of the chosen pairing for Round 3:
Due to general opinion, I'm going to scrub Round 3 and start it over later today.
-- Rogue Jedi, 10 May
After posting the above in chat, he flagged the question and asked the moderators to delete it. He also made an announcement in Mos Eisley, which was pinned for a while:
Round Three of the Showdown event is going to redone. Sorry for the confusion. Sorry for messing it up the first time.
-- Rogue Jedi, 11 May
I'm not sure exactly when the new Round 3 is to be expected, but hopefully within the next couple of days if all is going well with Rogue Jedi, whose latest announcement was:
I'll have to do it this weekend. I've got a lot of stressful work to do in my real life right now.
-- Rogue Jedi, 12 May
Apologies for the confusion; I or Rogue Jedi should probably have edited a cancellation/postponement notice into the top of the meta post before deletion. I've now rectified this oversight by putting a bold title at the top to make clear what's happening with Round 3.