finding missing folder on iPhone

My default notes, calculator and 1 other app were in the "Productivity" folder on my home screen. Its disappeared from all screens. The apps are all there as I can find them using Searchlight. But that takes me to the app and opens. I can't access the Productivity folder anywhere, and I can't open up the Apps in it by clicking on them using their icon.

I have swiped through all my screens, and looked through my other folders to see if somehow the folder is within another folder, but its not. Thanks