Speaking to CBS News, Balkhi said the Islamic Emirate was not seeking to negotiate or trade over the equipment, which it considers government assets.
Masadykov said security along the Tajikistan-Afghanistan border is a priority for all CSTO member states.
Previously, Zabihullah Mujahid, spokesman for the Islamic Emirate, rejected US calls for the return of the equipment.
Earlier this year, US Secretary of Defense Pete Hegseth ordered a comprehensive review of the withdrawal, citing the need for accountability and lessons learned.