The ruling overturned a 2021 one that had determined that the case was time-barred.
American Jew Benjamin Reuben Zalman-Polun faces the death penalty in the DRC for his role in a failed coup attempt amid espionage claims and limited US intervention.
All three were found guilty of criminal conspiracy, terrorism and other charges, and sentenced to death in a ruling read out on live TV.
The ICC accepted filings from over 60 governments and NGOs regarding arrest requests for Netanyahu, Gallant, and Hamas officials.
The US Treasury imposed sanctions on Gertler in 2017 and 2018, accusing him of leveraging his friendship with former Congo President Joseph Kabila to secure lucrative mining deals.
The assailants fired guns at people working in fields in Mulekera commune outside Beni, Mulekera Mayor Ngongo Mayanga said on Saturday.
A UN source said they were investigating "credible" allegations of over fifty deaths after soldiers blocked the protesters.
To date, only five countries have opened Jerusalem embassies: the United States, Honduras, Guatemala, Kosovo and Papa New Guinea.
In the Ituri province, some 3 million people are in desperate need of aid, according to a UN humanitarian agency.