ICEE2020 will be held in Kaya Hotel and Resort in conjunction with the 3rd international conference on Sustainable Science and Technology (ICSuSAT 2020) in the period 3-5 July 2020.
More infos. Can be found here.
Visa is not required to enter Turkey for many citizenship, there are still some countries requring visa. A List of countries requiring visas and details about visa processes can be found from here