If someone in Nepal is interested to invest in Securities Shares overseas, how does he/she send money to that particular country in order to buy/sell the shares?

i would check with few brokerage firms in Nepal to see if they have overseas reach. most countries do not allow non-citizens to directly invest in their market. so, i would assume your best bet is to open an account with one of the internationally recognized brokerage firms like Fidelity, Merril Lynch, etc.

I don't think there is a legal provision in Nepal for Nepalese to invest in another country due to restrictions on the movement of foreign currency. I doubt any stock broker in Nepal (I used to be one) knows how to invest abroad. Hence, depending on the amount you have to invest and if you can manage to procure foreign curreny, you can contact brokerages in another country. If you have a lot of money to invest, you can contact Citibank for Private Banking. They can guide you. I heard that a person from Citibank visits Nepal at least once a year to help rich in Nepal invest abroad.