Bahrain Belarus BelgiumBermuda Bolivia Britain Burundi
Czech Republic is a country. It has 13 letters.
There is no word that can consist of 7 consonants and only have 3 letters. Consonants are letters.
Those letters spell Cyprus.
Liechtenstein is a country. The name includes thirteen letters. It is the country that has the most letters in its spelling.
Vietnam
America
England
Austria
A desert county with seven letters includes Algeria.
Out of those letters, I'd try America.
BAHAMAS
Denmark.
There is no such country. There is no country that starts with A and ends with T, let alone a 7-lettered one.
Bahrain Belarus BelgiumBermuda Bolivia Britain Burundi
One country that fits your criteria is Finland. It has seven letters, the third letter is 'n,' and the sixth letter is 'a.'
The country with the letters "newsed" is Sweden.