The dispute over the Grand Ethiopian Renaissance Dam
Grave concerns downstream
However, the other parties remain uncertain over the GERD. Egypt fears the dam will endanger its supplies of Nile water, while Sudan is concerned about the dam's safety and water flows through its own dams and water stations.
Egypt had said this latest meeting represented the last chance to re-start negotiations before Ethiopia begins to fill the dam for the second year in a row, after seasonal rains begin this summer.
Ahead of the latest round of talks, Egypt's President Abdel Fattah el-Sissi said there would be "inconceivable instability in the region" if his country's water supply were affected by the dam.