I have a total of 8903 cards in one deck, when I click on it to study, just 8564 are shown as New. (as you can see in the imagem below). I clicked on the “forget” to make all of them New again before studying. There is no suspended card.
That’s a personal choice, it depends on how your cards are done and on your style of learning, I personally use that option in some decks but not in others.