In Apple's support document Delete photos on your iPhone, iPad, and iPod touch you will find these instructions:
*You will find the Recently Deleted album by scrolling down after taping on the Album tab at the foot of the Photos app. It is represented by a bin icon.
Recover deleted photos or videos
If you accidentally delete a photo or video, you have 30 days to get it back from your Recently Deleted album. When you recover photos and videos, they go back to your All Photos album. Here's how to recover deleted photos or videos:
- Open Photos and tap the Albums tab.
- Scroll down, tap the Recently Deleted album, then tap Select.
- Tap the photo or video that you want to keep or tap Recover All.
- Tap Recover again to confirm.
If you're missing a photo or video, you can try these steps to find it. Learn what to do if you're missing a photo or video.
However, this won't work if you have already chosen to permanently delete them by choosing Delete All.