@AnnaGG Yes, it was this weekend. If you mean invited to visit but declined to come, I'm not sure, but I doubt it. ND sent out invites before most other programs sent out acceptances and fully covered travel expenses, so people would have no reason to not check it out if they received an invite. I think one or two people couldn't make it because of weather.
If you mean turned down an acceptance offer, than no. Offers are not out yet. We were told that the adcomm is meeting this week. If I get accepted, I will most likely attend. The funding is excellent and the campus has so many unique resources related to research and funding. The program is the best fit for me as well.