"The outbreak continues to primarily affect men who have sex with men who have reported recent sex with one or multiple male partners, suggesting no signal of sustained transmission beyond these networks for now," it said.
Cases have shot up 77 percent since the last report to 6,027, the WHO said, with the bulk of them reported in the European region. However, all three deaths have been reported in Africa, the report showed.
WHO says nine new countries, territories and areas have reported monkeypox cases since its last update.
Earlier on Wednesday, the World Health Organization said that it will reconvene its monkeypox experts to decide if the worsening outbreak now constitutes a global public health emergency -- the highest level of alert.
The UN health agency's director-general Tedros Adhanom Ghebreyesus said he would hold a second meeting of the emergency committee on monkeypox, with more than 6,000 cases now confirmed in 58 countries.
A surge in monkeypox infections has been reported since early May outside the West and Central African countries where the disease has long been endemic. "I continue to be concerned by the scale and spread of the virus," Tedros told a press conference from the WHO's headquarters in Geneva.
"Testing remains a challenge and it's highly probable that there are a significant number of cases not being picked up."
The WHO's 16-member emergency committee on monkeypox is chaired by Jean-Marie Okwo-Bele from the Democratic Republic of Congo, who is a former director of the WHO's Vaccines and Immunisation Department. The normal initial symptoms of monkeypox include a high fever, swollen lymph nodes and a blistery chickenpox-like rash.
