Only the Department of Immigration can decide if they will grant you a third interview for an engagement interview to live in the U.S.
Make sure you and your fiance know each other well before going for the interview.
The best way to bring fiance to live in US after failing interview is to go and marry her in home country so that she can qualify for visa as a spouse. However, this depends on your immigration status.
They may interview for the fourth time but the result may stay the same if your fiance's documents and eligibility is in question.
It is always a good thing to hire a lawyer to prepare documents for you if you are requesting to live in the U.S.
"The Third Rock From the Sun"? That would be US. we live on it we die on it we study on it its earth.
Domino Theory
In the US if a man is entering into an engagement with a woman it isn't traditional for the man to wear an engagement ring. The woman is typically the one who wears the engagement ring.
In order to pass the interview at the Embassy of the United States in order to enter the country, you will need to be completely truthful in your interview.
When you go for the US embassy interview you will be given an interview only after you have passed your interview.
You should get a marriage license from the country of origin.
The number of people who fail the interview are not given the US visa. This number depends with how well they answered the questions asked.
Each case is different with the INS. There is no specific percentage for you to get a Visa if using a lawyer.