Edit, 15 September 2019, Johan: new package available for the 1.23 Hotfix 2 version, get it here. When upgrading from version 1.22 make sure to uninstall the old version and reboot before installing to prevent the kernel driver not being able to uninstall. It’s still only available for 64-bits versions of Windows.

Original post:
I noticed the native installer for VeraCrypt does not have an option for silent installation so I created an MSI Installer you can download here for it (version 1.22 at the moment). The package is only for 64-bit versions of Windows for now and has been tested on Windows 10 x64 and Windows 7 x64. It should also work with distribution software like SCCM.

To install the package silently use
msiexec.exe /i VeraCrypt.msi /qb

To silently remove the package use
msiexec.exe /x {E254AA9E-A48A-4A92-AF75-E6FF77C1A915} /qb