Ambassador
An ex-ambassador is often referred to as a former ambassador or a retired ambassador.
Their husband/wife. If an ambassador is married,his/her wife/husband will not become an ambassador.
I believe you are thinking of an ambassador.
You would put The Ambassador of ...then what country he represents. When talking to an Ambassador , he/she are Ambassador
The full title of an ambassador is "Ambassador Extraordinary and Plenipotentiary."
If the Ambassador is currently active in the Diplomatic Service, it would be Mr. Ambassador or Madame [ Mme.] Ambassador.
The proper title for a retired ambassador is "Ambassador (Ret.)"
There is an American ambassador to Russia. The current ambassador is John Beyrle. Evidently no American can be a Russian ambassador to other countries.
The abbreviation for "Ambassador" is "Amb"
My mother is an ambassador
this is the ambassador of America