Between 2011 and 2021, more than 30,000 Syrians were granted asylum in the UK - but on Monday the Home Office said it was no longer possible to assess outstanding cases given the change in circumstances there.
It means the government has not determined whether Syria, under the new rebel-led authorities, is a safe country which people could be sent to. It has stressed people will not be sent to Syria while the process is ongoing.
Mr Kassas is among the 6,500 people the Home Office has said will be impacted by the pause - and who the Refugee Council warned could be "stuck for months" with their status in limbo.