What are the 3 countries west of the iron curtain?
not sure if there is more info you'd be offering, but I'll list all the countries West of the Curtain
These countries (if NATO) would be; Norway, West Germany and Austria, being on the West side of the Iron Curtain.
If you had a map or something for homework, this map I have provided should help you fill it out, if you have anymore queries, please do not hesitate to ask!
Hope this helps