K3-k4-visa form I129f?

I want to file a K-3 visa for my wife from maseru lesotho.She is from the Philippines but is holding resident permit here and also a work permit.I went to the american embasy 2 days ago and the consular told me i couldn't file for K-3 here only in america.Is this true?And Also the purpose of the K-3 is to get your'e spouse or family member to the Usa while the i-130 is still pending right?The reason i'm asking is because on uscis.gov it says the K-3 is for alien fiance.