Is it possible to call a client script in restlet?

as a library you can call

I need to call a suitelet internal url, we can call suitelet internal url with client script , So I was checking if we can call a client script in restlet and the client script intern calls suitelet

you can use the suitelet as backend in restlet

It sounds like you need to take a step back and actually think about what you are trying to achieve, and how. What you are attempting is a tangled mess