NASCAR Heat 3 is available internationally on Xbox One, PlayStation 4, and Steam stores sometime between September 7, 2018 and the first of the year in certain countries. (Note: If you choose to purchase a disk copy of NH3 in an unapproved country, it will have limited functionality.)
You can see the list of approved countries below:
Austria
Belgium
Bulgaria
Croatia
Cyprus
Czech Republic
Denmark
Finland
France
Germany
Greece
Hungary
Iceland
Ireland
Israel
Italy
Luxembourg
Malta
Netherlands
Norway
Poland
Portugal
Romania
Slovakia
Slovenia
Spain
Sweden
Switzerland
Turkey
United Kingdom