The rate of child casualties is 11 per cent more compared to the same period in 2018, said the report titled, "Preserving Hope in Afghanistan: Protecting children in the world's most lethal conflict".
The Unicef report blames all sides of the warring parties for the "devastating impact" on children due to the Afghanistan conflict that has dragged on for 40 years now, reports Efe news.
"In the first three quarters of 2019, 631 children have been killed, 1,830 injured. The numbers are shocking. We call on all parties to the conflict to fulfil their responsibility under international norms to shield children of the consequences of war," Unicef Country Representative Aboubacar Kampo told journalists here at the launch of the report.
The shocking levels of violence were mainly attributed to a surge in suicide bombings and ground engagements between pro and anti-government forces.
Overall, the conflict has killed nearly 6,500 children and wounded almost 15,000 others between 2009 and 2018, making Afghanistan "currently the world's worst killing field".
Unicef spokesperson Alison Parker told Efe news that the agency wanted to draw the world attention to the fact that Afghanistan "is one of the most dangerous countries on the planet for a child".
In 2018, the UN verified 162 attacks against schools, hospitals, and their staff.
It also recorded 44 incidents in which humanitarian aid could not be delivered to needy communities, mainly due to the active war, in a country where an estimated 55 per cent of the population live below the poverty line by 2016, compared to 34 per cent in 2007 and 2008.
The UN agency is currently providing treatment to 277,000 severely-malnourished Afghan children.
It was also increasingly working to help some of the 2.8 million people affected by a severe drought in 2018 in a country where only 64 per cent of the population has access to drinking water free from outside contamination.
( With inputs from IANS )