No, there is not. There is 7 card stud or 5 card draw.
View page
yes a wild card can stop a draw and or a draw four card
View page
Any time you are told to draw a card (by effect, or at the
beginning of your turn) then you must do so, it is not optional,
unless the card specifically says you MAY draw a card.
If you must draw a card, and cannot, then you lose the duel.