I deleted an old Timeshift folder into the 'trash' and now it won't delete permanently (I can't empty the trash folder).
Is there another way of empting the trash folder that will delete this Timeshift folder?
I have tried from the terminal and opening Nemo with sudo and that doesn't delete the folder either.
Any ideas?

Thanks gael.

Which Linux distribution are you using?
What specific command did you use in the terminal to try to delete it?
Is the folder empty? You can't delete if the folder is not empty.
What specifically happens when you try to delete?
Generally, if you highlight something and hit Shift + Delete, you get a pop-up asking if you are sure you want to delete. Have you tried that?

I am using Linux Mint 17.2 64 bit Cinnamon.
Because I wanted to delete the contents of the 'Trash' folder, I clicked on the button within the open folder that asks, "Empty Rubbish Bin" (I renamed the trash icon 'rubbish bin' as it seemed more British English). The Trash folder contained an old 'Timeshift' folder (from my previous distribution) which contained other unrelated items. The Trash folder also contained a multitude of other unwanted stuff that had collected there over several weeks. I thought it was time to delete them. I pressed the "Empty Rubbish Bin" button and nothing happened. I also tried from the Terminal (sudo rm -fr $Home/ .local/share/Trash/files/*) and still nothing happened. I then deleted each individual file/folder leaving the Timeshift folder to the last. All other files and folders deleted without problems. My guess is is that the Timeshift folder was very large after a pop-up said it was 'preparing' after I had again pressed the "Empty Rubbish Bin" button. I left it running overnight and when I looked this morning it was gone.
Perhaps the problem was my impatience and that the system was attempting to delete the Trash folder, it just required time. A lesson learned I think