Scott Jaschic published a list of private, nonprofit colleges that have closed between 2016 and 2019 in Inside Higher ED on 13 June 2019.
Click here to see the list:
https://www.insidehighered.com/news/2019/06/13/list-private-colleges-have-closed-recent-years
For more information, see also the YouTube video titled US colleges struggling with low enrollment closing at increasing rate (published 2 August 2019):
https://www.youtube.com/watch?v=l-uc1p5y-x0