Russia, China and Pakistan warned on Tuesday that the influence of Islamic State (IS) was growing in Afghanistan and that the security situation there was deteriorating.
Representatives from the three countries, meeting in Moscow, also agreed to invite the Afghan government to such talks in the future, the Russian Foreign Ministry said.
"(The three countries) expressed particular concern about the rising activity in the country of extremist groups including the Afghan branch of IS," ministry spokeswoman Maria Zakharova told reporters after the meeting.
The United States, which still has nearly 10,000 troops in Afghanistan more than 15 years after the Islamist Taliban were toppled by U.S.-backed Afghan forces, was not invited to the Moscow talks.
The gathering, the third in a series of consultations between Russia, China and Pakistan that has so far excluded Kabul, is likely to deepen worries in Washington that it is being sidelined in negotiations over Afghanistan's future.