Below are few of the Facebook pages for Programmers from Nepal known to me, if I missed any please add in the comment section I will be updating them.
https://www.facebook.com/groups/wordpressbhaktapur/
https://www.facebook.com/groups/wordpressnepal/
https://www.facebook.com/groups/231924633676927/?ref=search
https://www.facebook.com/groups/officialdevelopersnepal/
https://www.facebook.com/groups/109070762572263/
https://www.facebook.com/groups/rubydevelopersnepal/
https://www.facebook.com/mobile.apps.developers.nepal/
https://www.facebook.com/groups/vrnepal/
https://www.facebook.com/groups/nepaleserordeveloper/
https://www.facebook.com/groups/webdevelopersnepal/
https://www.facebook.com/groups/910111175782694/
https://www.facebook.com/groups/gdcnepal/
https://www.facebook.com/groups/JavaNepal/
https://www.facebook.com/groups/laravel.nepal/
https://www.facebook.com/groups/wp.plug.dev.np/
https://www.facebook.com/groups/dotnetdevnepal/
https://www.facebook.com/groups/developersnepal/
https://www.facebook.com/groups/codeigniter.nepal/
https://www.facebook.com/groups/wordpressthemedevelopernepal/
https://www.facebook.com/groups/607443336084988/
https://www.facebook.com/groups/607443336084988/
https://www.facebook.com/groups/354877791514518/
https://www.facebook.com/groups/symfonynepal/
https://www.facebook.com/groups/276304182470862/
https://www.facebook.com/groups/328411787331865/
https://www.facebook.com/groups/133816063348237/?
https://www.facebook.com/groups/589536991247892/
https://www.facebook.com/groups/613698375414575/
https://www.facebook.com/groups/145681835580766/
https://www.facebook.com/groups/128633937764549/
https://www.facebook.com/groups/611987645604146/
https://www.facebook.com/groups/developernepal/
https://www.facebook.com/groups/1627668140893566/
https://www.facebook.com/groups/1466585176901585/
https://www.facebook.com/groups/nepalr/
https://www.facebook.com/groups/519707794766102/
https://www.facebook.com/groups/100162466803741/
https://www.facebook.com/groups/ICT4MDN/
https://www.facebook.com/groups/gdgnepal/
https://www.facebook.com/groups/osdcn/
https://www.facebook.com/groups/156019947782168/
https://www.facebook.com/groups/1535774786634244/
https://www.facebook.com/groups/1518223711746970/
https://www.facebook.com/groups/528508153879435/
https://www.facebook.com/groups/699516416844438/
https://www.facebook.com/groups/298732896961314/