You Do Need power plug adapter while traveling from Nepal to Syria.

Here is Why You Need An Adapter

The outlet and plug type used in Syria are C, E and L and in Nepal are C, D and M. This is how they look like.

Nepal

In Nepal, outlets of type C, D and M are in use.

Type C

Type D

Type M

Syria

In Syria, outlets of type C, E and L are in use.

Type C

Type E

Type L