Stock Shuffle?

Ok I have some questions:

just to clarify:
you "take" 3 cards every time you need to take
cards from the stock. (i.e. there is no other move
you can make and there are no 'open' stock cards
you can play)

if you cant take 3 cards, take all cards you can. (2 or 1)

if the stock is empty, you put all 'open' stock
cards back and you start over.

you can only put all stock cards back 3 times.

here's my question:
do you have to shuffle the stock if you put the
cards back?
If not, in what way do you have to put the cards
back?

Tnx in advance.

You will virtually turn the deck over. So, the stock is in the same order as when you started with it, minus the cards you have taken from the stock...

Can I turn over the stock 3 times or go through the stock 3 times.

Through the stock 3 times....