To make the rhubarb syrup mix together the water, sugar and rhubarb in a medium pot and place on medium heat until it comes up to a boil. Reduce heat to a simmer and cook until the rhubarb has broken apart, about 15-20 min. Set aside to cool and then drain the rhubarb through a fine mesh strainer and reserve the syrup.
Nutrition calculation is an estimation only. If you need nutritional calculations for medical reasons, please use a source that you trust.