I would refrain from letting her outside by herself. As others said, 10 weeks is far too young to be left attended outside. It can be very dangerous, you're lucky she was trapped in another yard.

My dogs are well over 10 weeks and I still don't trust them outside alone (not saying that they aren't left for 5-10 minutes at a time while I run inside and answer the phone, use the restroom, etc.) They know not to dig now because I never left them unattended outside when in the learning stages.