The president of Palau, Tommy Remengesau, says the COP 21 agreement is going to fall short on what needs to be done to combat climate change.
While delegates have agreed on a draft text, it is still too long and contains numerous square brackets, indicating sections that have not been resolved or options still to be chosen.
Undecided issues include the details of a loss and damage provision, and whether the aim should be to keep global temperature rises within 1.5 or 2 degrees of global warming.
Mr Remegensau says he knew before the talks an ambitious agreement was unlikely.
"Unfortunately we knew coming to Paris that we are not going to get the ambitious package that scientists are telling is should be done. So actually our discussions are going below what the scientists are telling us and unfortunately we now know we are talking about 2 degrees or 1.5 degrees which is far less than what the scientists recommend needs to be done."