Re-insert particles that left the domain

Hello there!

I hope you can help me with a situation. I have a particle template with diferent sizes, then I insert certian mass of these particles into a container randomly. The container sort the sizes by a threshold, so sizes below the threshold leaves the container. I want to re-insert the particles that leaves the container using the same feeder that insert the original template.

What should I do?

If you need more information, please ask.

Thanks for your time.

Greetings

EDIT:

Here I attach a pic to explain what I want to do