I imported photos from an SD card and even edited a few. Then I ejected the card and deleted photos on it to use it again. Now I can see the photos in LR but they have a question mark on them. When it tries to locate them it cannot. I checked on my computer by searching the date and they are not there. They show in a folder called Nikon D5100 in the lightroom 3 navigator screen and it even shows that there are 345 pictures. But when I click and open it, it takes me right back to the photos with the question marks. Is there anyway to recover these. Why did they go missing?
You need to relocate the Images in Lightroom catalog. whenever we import the images to Lightroom we select the destination for it to save the original images, if you remember what location you selected.
Please refer the link: Adobe Photoshop Lightroom Help | Locate missing photos
Let us know if that helps.