has been forced to ration food.
The NGO fears desperate families could be pushed to hand over daughters to traffickers or send sons on dangerous sea crossings to Malaysia for work.
In Mozambique, Solidarites International had to shut down a programme providing food and water to internally displaced people, including tens of thousands of children.
In Malawi, similar numbers will no longer receive free school meals, according to another NGO which requested anonymity for fear of US reprisals.
Without food, many children will drop out of school -- all the more galling, the NGO said, as millions of meals are reportedly left to rot in warehouses due to the US decision.
"It's like the rug is being pulled out from under their feet," said one staff member.
- 'Last lifelines' -
Women and girls are often the first to lose out, with their education traditionally sacrificed first.
The Norwegian Refugee Council said it will have to "significantly reduce" aid to women and girls in Afghanistan because the US funds paid for many of the female staff who worked with them.
"The very last lifelines for many women and girls will be taken away," said Camilla Waszink, a director at the organisation.
Malnutrition already affects 150 million children under five, and the numbers could surge.
"Millions of additional children will suffer stunted growth" and impaired brain capacity, said Kevin Goldberg, director of Solidarites International.
In another blow to children, Washington is expected to drastically reduce funding for vaccination programmes in poor countries.
Sania Nishtar, CEO of the Vaccine Alliance, warned the cuts -- if confirmed -- could result in "an estimated 1.3 million children dying from vaccine-preventable diseases".
