The government made the announcement after the OAS voted to hold an meeting of foreign ministers to discuss the spiralling crisis in Venezuela.
Neighbours have expressed concern at mounting unrest in the country.
Violent protests against the government continued in the capital Caracas on Wednesday. One protester was killed.
He was hit by a tear gas canister during clashes with police.
Nearly 30 people have been killed since the wave of protests against President Nicolas Maduro began last month.
