@Robert **********
Good Luck...you are now on amnesty to Sept 26.
Any extension application must be processed during August.
The added 30 days... if with an Embassy letter of request ...will be added on to Sept 26.
Do you hold residence status in Nepal? Or is your wife from Nepal?
In any even make sure you are eligible to make a request from the Nepal Embassy in Bangkok.
Most want to see the passport of their citizens before issuing a letter requesting the 30 days extension.