State Department spokeswoman Heather Nauert confirmed that the restrictions have been imposed in all four countries, effective Wednesday.
The move comes as President Donald Trump's administration places visa restrictions on four African and Asian nations that have refused to accept citizens deported from the U.S.
The new rules, which go into effect on Wednesday (Thursday NZT), do not affect visas that have already been granted.
The visa sanctions vary in severity, with Eritrea facing the harshest. Citizens applying for B visas - temporary visitor visas for business or tourism - within Eritrea will be rejected, according to one of the cables.
The State Department declined comment on the cables, saying it would not discuss internal communications.
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(Ecofin Agency) - Starting today, September 13, 2017, Guinean officials will no more be able to get United States visas.
Cambodia faces the lightest sanctions.
Likewise, in Sierra Leone, the visa sanctions affect Foreign Ministry and immigration officials applying for tourist and business visas at the U.S. Embassy in Freetown, according to another cable posted by Reuters. The sanctions are even narrower in Cambodia, targeting employees of the Ministry of Foreign Affairs with the rank of director general or higher and their families.
It said the suspension was implemented under United States immigration law in response to Cambodia's refusal to accept back its nationals whom the USA wants to repatriate.
In practice, the USA has rarely taken that step - just twice in the past decade and a half, according to a Department of Homeland Security spokesman.
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"Starting from September 13, 2017, the USA embassy will no more issue B, F, J and M visas to Guinean officials and their family members, with limited exceptions", U.S. embassy in Guinea revealed in a statement.
Three of the four countries included in the current visa restrictions were on a list of nations deemed "recalcitrant" by USA immigration authorities in July. The countries are among a dozen that the Department of Homeland Security (DHS) had previously deemed "recalcitrant" in the repatriation of criminal aliens.
Other countries listed as being recalcitrant in accepting deportees from the US include China, Cuba, Vietnam, Laos, Iran, Burma, Morocco and South Sudan. Neither department would identify the nations by name at the time.
The Trump administration has put heavy diplomatic pressure on countries that resist accepting deportees.
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