It has been considered 3rd world on some maps, but i don't believe so, due to Denmark having it.
Greenland
It is more likely a 1st or 2nd world country
1st
Of course England is a 1st world country.
South Korea is a first world country and North Korea is a second world country.
A third world country is one in which was colonized. Thailand has never been colonized thus it is not a third world country.
3rd world country.It is part of NAM(Non allied movement).
Austrliais the largest island in the world and I think Greenland is either 2nd, 3rd, 5th, or 6th.
The northern part of Italy is considered 1st world, and the southern part 3rd world.
Finland is ranked as one of the smartest countries in the world, often placing in the top 10 in global education rankings.
The second largest country in Europe is Kazakhstan, including transcontinental countries. France is the second largest country wholly in Europe.
Singapore is definitely not a third world country.It can be classified as a first world country if you look at it's GDP and economic status.In fact Singapore has been developing rapidly since its independence.