LR not seeing pics to select for import

Using subscription ver 6.1.4

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Today I opened LR …. Used Library to go to folder I wanted to look at ….. folder is there and so are 17 pictures that should be there ….. however in the ‘actual folder’ on my HDD there are 20 pictures …. 3 of them are not shown in LR

I tried ‘import’  but it does not show any files to import from that folder.

How can I ‘force it’ to take on these extra 3 images.

Lightroom is not a file browser like Windows Explorer. It does not have to show all of the photos that your operating system sees in that folder. Lightroom only knows about the photos that have been imported. 

When you can't import photos, it is almost always because the photo has been already imported into Lightroom, and since you don't see it in that folder in Lightroom, you have accidentally imported it into another folder. You need to do a search in Lightroom for these photos. Please follow ALL FOUR of these steps in Lightroom, in order, and let us know if this finds the photos.

1. Click on All Photographs
2. Turn off all filters (Ctrl-L once or twice)
3. Expland all stacks (Photo->Stacking->Expand All Stacks)
4. using the Lr filter bar, search for one of these photos by file name