Beatrice Ambaye is an intern at a small communications company in N'Djamena, the capital of Chad.

A few months ago, she applied to continue her communications studies in the United States.

She said that her application was on track and that she had already passed her visa interview - that was until this week's announcement of visa restrictions for Chadian nationals wishing to travel to the USA.

Ambaye said that she was “shocked and disappointed” by Trump’s decision.

"After the interview (at the US Embassy in Chad), I had hope, I could already see my dreams coming true, but after that decision, I was very disappointed”, she said.

Ambaye is not alone in her predicament.

Other Chadians who had already received their visas and were soon due to fly to the United States were taken by surprise by the Trump administration's decision.

Hassan Sani Ibrahim, a student, said: “We have already obtained the visas and here is the date: June 9th (to travel). And (now) no Chadian can leave to go to the United States."

The ban is due to take effect on Monday, 9 June.

The US has said it is being done to protect the US from 'foreign terrorists', despite some of the affected countries not having been directly linked to any recent terrorist activities.

Chad and other countries have been accused of having high rates of visa overstaying, particularly for tourist, student and professional visas.

This has been deemed a breach of US immigration laws.

In response, Chad suspended visas to American citizens.