"deny support" is a correct and usable phrase in written English.
You can use it when someone refuses to give assistance, help, or approval to something. For example: The government will deny support to the proposed legislation.
We'd rather be taken in than deny support and advice to someone who's real".
"No German government would grant unconditional support, no German government would deny support to those who qualify".
The insurgent groups deny support from any foreign government, including Syria, but claim they have been offered and rejected funding and arms from Iran.
Fearing controversy, the N.I.H. decided to deny support to research using lines that might eventually be created in the laboratory by "therapeutic cloning" to match specific patients with specific diseases.
Warnock has since criticised unintended consequences of the system she helped to create, calling the expense of administration and the tendency to deny support to mildly disadvantaged children "appalling".
"This administration has manipulated LGBT families for political gain as much as anybody, and after his campaign's ridiculous contortions to deny support for marriage equality this week he does not deserve praise for an announcement that comes a day late and a dollar short".
Pakistan and Iran routinely deny supporting the insurgency.
He did not deny supporting Muslims in their struggle in Chechnya or in other Islamic wars.
The three countries deny supporting Jundallah, and the claimed link to Al Qaeda has not been independently corroborated.
Rwanda and Uganda strenuously deny supporting the rebellion.
They all deny supporting the Muslim Brotherhood, which was designated a terrorist organisation in December.
