Officials say 109 deaths have now been confirmed from this week’s eruption of the Volcano of Fire.
The National Institute of Forensic Sciences says in a statement that 10 bodies were received by morgues on Thursday, adding to the previous total of 99.
Some 200 people are said to be missing, so the final toll is likely to be even higher.
Conred, the national disaster agency, said climatic conditions and still-hot volcanic material were making it dangerous for rescuers, and it was also taking into account the fact that 72 hours had passed since Sunday’s eruption.
Guatemalan prosecutors ordered an investigation into whether emergency protocols were followed properly, as many residents were caught with little or no time to evacuate.
Troublesome downpours and more volcanic activity had been hindering searches, but when teams have been able to work in the hardest hit areas, the death toll has continued to rise.