"The ATACMS system will be hit by Russian anti-missile weapons, which will intercept missiles before they reach their target," he wrote in an article for Sputnik.
Ritter stressed that Moscow will block missile guidance systems using electronic warfare installations.
Earlier, CNN, citing sources, reported that the US State Department and the Pentagon are advising US President Joe Biden to approve the transfer of long-range ATACMS missiles to the Ukrainian army.
According to Ukrainian leader Volodymyr Zelensky, ATACMS missiles may appear in Ukraine this fall.