Three Sheratons have left in the last few months:

Sheraton Bordeaux Airport, France - closed
Sheraton Pretoria Hotel, South Africa - renamed
Sheraton Lampung Hotel, Indonesia - renamed

Three Sheratons have opened:

Sheraton Bariloche Hotel, Argentina - opened a few months ago, a conversion of the Hotel Panamericano
Sheraton Buenos Aires Greenville Polo & Resort, Argentina - completed in 2019, but never opened until recently
Sheraton Hanoi West, Vietnam - formerly the Hyatt Regency, before that the Crowne Plaza