The three countries also highlighted the importance of de-escalating tensions in Iraq and Iran, and reaffirmed their determination to fight Islamic State.
"We reaffirm our commitment to continuing the fight against Islamic State, which remains a priority. It is essential that we keep the coalition, in this regard. We call on the Iraqi authorities to continue to supply the necessary support to the coalition," the E3 group said in a statement.
"We are ready to continue talks with all parties in order to contribute to de-escalating tensions and re-establishing stability in the region," added the E3 group.