The July 11 consultations had been previously scheduled and are expected to involve representatives from the European Union, Ukraine and Russia.
"Our position on the essence of the agreement is clear: it cannot be discussed. But we can discuss its stages, primarily, as far as standardization is concerned," Poroshenko noted.
The president previously said that Russia should be particularly interested in the agreement "because Ukraine can be a bridge enabling Russian commodities to enter European markets."
Ukraine's new trade agreement with the EU was signed seven months after former President Viktor Yanukovych shunned a deal with the regional bloc in favor of working closely with Russia, a move that led to widespread protests across the country and his eventual ouster
Poroshenko's commitment to economic dialogue with Russia comes amid heightened tension with Russia over its support for pro-Russian separatists in eastern Ukraine.