Yes, you can restrict the number of deliveries for a delivery date. You can set the number of deliveries in the "Maximum Order Deliveries per day (based on per order)" field under General Settings -> Date Settings tab in the Order Delivery Date on the admin side. A delivery date will be disabled for further deliveries in the calendar after this number of orders.


To restrict the number of deliveries based on the cart product quantities, you need to check "Enable Maximum Deliveries based on per product quantity" checkbox under General Settings -> Date Settings tab.