Do not let mix of products to apply discount if same product is added

I want this discount to apply, if a customer buys 3 items from any of the 5 collections. But only 1 item per collection. so for example they will have to buy 1 cleaner, 1 toner and 1 cream and build their skincare "set" in order to get the 10%. It should not apply discount if they buy 3 "toners".