The report suggests that the Saudi alliance's air and land blockade is the primary reason for the grim developments, particularly given its continued heavy bombardment near the port of Hodeidah, through which Yemen imports 90 percent of its food supply, as well as critical foreign aid. A leading charity has said that nearly 85,000 children have died from acute malnutrition since early 2015.
It said the estimate was based on data compiled by the United Nations, which has warned that up to 14 million people are at risk of starvation in Yemen, where Saudi-backed forces are battling Iran-aligned Huthi rebels.
This vital entry point for United Nations and other humanitarian aid is also the centre of the conflict between the US-backed Saudi-led coalition and the Iranian-aligned Houthis.
At least 85,000 malnourished Yemeni children may have died in the last three years.
That food could meet the needs of 4.4 million people, half of whom are children.
Children protest against the Saudi-led coalition outside the U.N. offices in Sanaa Yemen
Any further decline in imports, the charity warns, could lead to starvation.
"For every child killed by bombs and bullets, dozens are starving to death and it's entirely preventable", said Tamer Kirolos, Save the Children's country director in Yemen.
"Children who die in this way suffer immensely as their vital organ functions slow down and eventually stop".
"Parents are having to witness their children wasting away, unable to do anything about it", Kirolos said.
Save the Children said the "conservative" estimate is based on average mortality rates for Severe Acute Malnutrition, which the United Nations says has afflicted more than 1.3 million children since a Saudi-led coalition went to war with Yemen's Houthi rebels in March 2015.