Does US embassy in Nepal issue visas to parents who want to come to attend their son or daughter's wedding who are at present enrolled in school. I want to get married to my fiance this summer and would like to invite my parents and relatives. My fiance would like to invite his parents and relatives too. I wonder if anybody has invited their parents while as students to attend their wedding. I know if I was citizen or green card holder, it could be done but I'm not sure if it's possible when we are F1 status. Thank you if you could share some knowledge or your personal experience.

as long as you can show enough funds and support when they here in USA, there be no problems.
also your parents must be able to convince the consular that they are only visiting US as non-immigrants.
 
congratulation!