Chile decides it cannot host COP25 because of social unrest.

Statement by UN Climate Change Executive Secretary Patricia Espinosa

Date: October 30, 2019

 https://unfccc.int/news/un-climate-change-statement-on-cop25

Earlier today, I was informed of the decision by the Government of Chile not to host COP25 in view of the difficult situation that the country is undergoing. We are currently exploring alternative hosting options.