What suitable sentence to explain the item cant be deleted?

Question

I want to tell the user that this item cannot be deleted because this is the only item left in the list.

Answer 1

Error message: "You need to have at least one item in this list."

Additionally, you can communicate this (im)possibility leveraging on the the Delete button.

• Grey out the Delete button (that automatically sends the signal)
• If they still attempt to click on it, you can then show the message.