welcome to KH!
The picture has uploaded just fine. There is a gap that may look blank but if you scroll up, you'll see the photo. What pattern are you following? Can you give us a pattern name?
You can either ladder the 3 edge sts down one at a time and correct the mistake or you can take out the rows to the last good row and re-knit.
If you decide to ladder down, start with the stitch closest to the stockinette stitch (the stitch 3 in from the edge). I assume there is loose yarn behind these edge sts which you can use to ladder up like this:
The very edge stitch is a bit more of a problem but this tutorial may help:
If all this sounds like too much, then your easiest bet is to take out the mistake rows and rework them.