French President Emmanuel Macron speaks to German Chancellor Angela Merkel after being awarded the Charlemagne Prize during a ceremony in Aachen, Germany May 10, 2018.
"The annexation of Crimea was a flagrant violation of global law, and therefore Russia's exclusion from the G8 format was inevitable".
In addition to the disruptive effects of the rift in NATO and Trump's exit from the Paris global climate treaty, Merkel pointed to the fresh conflict over trade and the USA leader's withdrawal from the Iran nuclear accord last month.
The new format was put in place by the coalition that took office in March.
She said that would "greatly strengthen the consistency and coherence of our foreign policy".
Merkel told lawmakers on Wednesday that Germany will work to ensure that the summit's communique doesn't fall below what was agreed at last year's G-7 and Group of 20 summits.
She said Russia's readmission to such a format is not now feasible.
German chancellors have not beforehand interacted straight with lawmakers in the identical approach British prime ministers do at their weekly query time.
In a weekend newspaper interview, Merkel offered her most detailed response to French President Emmanuel Macron's ideas for reforming Europe, seeking to avert a damaging rift with Paris at a time of anxiety over Italy and growing transatlantic tensions.
She said that points to a "serious problem with multilateral agreements".
There were few personal attacks during the session, which addressed issues ranging from diesel emissions to the number of women in parliament. Lawmaker Gottfried Curio accused the chancellor of being responsible for "the import of Islamists" and "endless human suffering at the hands of rapists and murderers".
Merkel replied that the influx that began in 2015 is "an exceptional humanitarian situation, [and that] Germany behaved very responsibly".
"It's over", a smiling Merkel said as speaker Wolfgang Schaeuble ended the session.