At his news conference in Seoul, Mr. Ban said that he had already notified Russian Foreign Minister Sergei Lavrov about the postponement of Mr. Roh's visit to Russia.
The South Korean Foreign Minister underscored that the Russian side had received the decision with understanding.
President Roh, whose powers were suspended on March 12, had planned to visit Russia in May or June, 2004.
However, no changes have taken place in the reception of foreign delegations, the sending of diplomatic missions, the conclusion of agreements with other countries or in South Korea's foreign policy, and "it will go on as before," said the minister.
"The earliest settlement of the abnormal internal situation in the country would contribute to progress in the entire diplomatic activity," said Mr. Ban.
Mr. Roh is waiting for a decision from the Constitutional Court. The court has 180 days to either recognize his impeachment as valid or reject it. Until then, presidential powers have been transferred to Prime Minister Goh Kun.
The conservative opposition, which has a majority in the South Korean one-chamber parliament, voted to impeach the president after accusing him of corruption and illegal support of the pro-government party before the parliamentary elections in April.