a dirty way to try your luck:
if the husband didn't list his wife on the relationship certificate/proof of relationship thing (you get from local government in Nepal) when he applied for whatever visa or DV to enter the States, then the wifey can apply as if she is single i.e. not listing her hubby on the relationship certificate thing. but it might/will create problems if:
- the hubby's name is on her nagarikata
- she wants to be her husbands dependent (in case she gets visa and enters US)

yo mula visa/dependent ko tenson le ni kasailai baaki rakhena, pachhi aafule ni yehi tanta khepnuparchha; samjherai dikka lagisakyo!