The ministry’s spokesman said in a statement that former president Pal Schmitt originally had been scheduled to attend the 18th summit of central European leaders, which takes place in Yalta, Ukraine, on May 11-12.
Ader assumes his official duties as president of the republic on May 10.
The ministry added that European and wider international criticisms of “unfavourable tendencies” in Ukraine had, in most cases, been “justified”.
In the face of calls to heed the human rights of detainees, including those of former prime minister Yulia Tymoshenko and other opposition politicians, no serious efforts had been forthcoming on the part of the Ukrainian authorities, the statement said.
Ukraine’s omission to act on commitments it signed up to as part of its association agreement with the European Union, in particular in the area of legal harmonisation, was a cause for concern, it said. The development of EU relations with Ukraine is contingent on the fulfillment of these expectations, the ministry added.