Species Identification: Beetle having trunk!
This is a weevil called Cleonis japonica. Here is a link to a specimen which was collected in 1904. (http://weevil.info/sites/weevil.info/files/Cleonis_japonica.jpg)
Here is a link to same site and one other which show where it was found.
(http://weevil.info/content/cleonis) and (https://www.iso.org/obp/ui/#search)
NP means nepal. Here is a link to something which I hope is a little more descriptive. 

https://www.zin.ru/Animalia/Coleoptera/pdf/arzanov_grebennikov_2017_cleonini.pdf

I wish you had taken better pictures.