Are there any chances that asd 10x8mm will cure itself?

No: Unless you are talking about a newborn, with an incompetent foramen ovale, no. That size will need to be closed in the cath lab with a device, or surgically on some occasions.

Unlikely: At that size they might watch it for a while in infancy to give it a chance. Yet, chances of it doing so are remote. Most would want it fixed prior to school age using a double mushroom device that could be inserted thru a catheter or occasionally by direct surgical repair..