what kind of degree ur wife has ?? if its a technical degree like nursing, physical therapy radiology , law n so on i suggest you to carry on if its not a non technical degree like bbs, ba , literature , english etc its not worth doing masters c will not find any job of her interest, n hardly if found will not help her sustain. even most of the engineering degrees are worthless unless its a full scholarship and c already has a green card .. as u said c has 3 year nelai degree im assuming its a old fashioned tu BBS, BSC or BA degree. if u want to do masters with those degree yes you can, c has to gre , gmat . there are zillions of private universities that take but are expensive , hunters college in nyc is affordable and good collage that take 3 year nepali degree n there a re plenty of nepalese . but personally i would recommend her to take a technical degree like physician assistant, nursing etc otherwise after having finished her masters here c might be ending working as a cashier in some store