Hello Sir/Madam. Thank you very much for giving us an opportunity to help you. I am Jins here to assist you. Please remember these things when we deal with your issue. It may take more than one step/answer to solve a problem. So If my answers don’t work or if you are not satisfied, please don’t Rate my answer as Bad or Poor Service, but please Reply back to me by clicking the “Continue Conversation” or “Reply” button and I will gladly continue to help. Remember, only Rate answer after you are 100% Satisfied. Please do not rate an answer, if you are not satisfied.
If you have deleted any note and want to retrieve it then you can retrieve it but you should not have deleted it permanently. To retrieve it you should go to recycle bin and open the file which was deleted and right click on that and tap on the restore option.after that file will be back to its initial folder.
If you permanently deleted it, you can restore it from iTunes, if you have a backup there.
Connect your iPhone
to the computer.
Right-click on your device and press ‘Restore from backup…’
Choose the latest backup and proceed.
If you have a backup on iCloud
follow these steps to restore from iCloud.
First tap into home page
From there tap on setting option.
Then press the iCloud option.
Now sign into iCloud account with your id and password.
After then Select the backup and storage button.
At last tap to done option.
If you do not have backup on iTunes and iCloud, you can try the following third party tools. They claims they can recover deleted notes also. But I do not have experience with these apps. SO I recommend you to try their trial versions first. Data Recovery for iPhoneWoundershare data recovery application