According to the statement, Bulgarian Prime Minister Boyko Borissov spoke with ambassador Boyko Kotzev to discuss the Skripal case and the international reaction to it.
"Prime minister Borissov has ordered that ambassador Kotzev returns to Sofia for consultations with the Bulgarian government," the statement read.
Earlier in the day, Ireland made a decision to expel one Russian diplomat in connection with Moscow's alleged involvement in the nerve agent attack on ex-spy Sergei Skripal and his daughter in the UK city of Salisbury.
The move came after the UK Prime Minister Theresa May accused Russia of the incident and ordered to expel 23 Russian diplomats from the country. Russia has denied the accusations and offered to help in the investigation.
Skripal, a former Russian military intelligence colonel who worked for UK intelligence, and his daughter Yulia have been in hospital in a critical condition since March 4 due to exposure to what the UK experts say was an A234 nerve agent.