The embassy says last month's expulsion of three consular officials and delays by Maduro's socialist government in authorising the arrival of new US officials makes it impossible to meet demand for visas.
An embassy statement yesterday says first-time applicants will not be able to schedule appointments, but those Venezuelans needing to renew tourist visas will still be allowed to do so.
In expelling the US officials last month, Maduro accused the US of joining with opponents behind near-daily protests in a plot to overthrow his administration less than a year after he was elected to succeed the late Hugo Chavez. Washington denies the charge.