The call came not only before the Putin-Trump summit in Helsinki on Monday but as the Russian leader was to meet France's President Emmanuel Macron in Moscow, where he was attending the World Cup soccer final on Sunday.
Maslin took him through some of the "irrefutable facts" that are not the "fake news" Trump often speaks of.
"That this killed our 3 attractive children and their grandfather, and destroyed our life and many other lives in the process, is an irrefutable fact", he said, adding, "It's not anger that I feel towards the two of you, its something much, much worse".
G7 nations at the weekend urged Russian Federation to "account for its role" in the 2014 disaster, saying the joint investigation had yielded "compelling, significant and deeply disturbing" findings on Russia's involvement. "That this killed our 3 handsome children and their grandfather, and destroyed our life and many other lives in the process, is an irrefutable fact", Maslin wrote.
Amidst the criticism, including from some members of his own party, Trump backtracked, claiming he misspoke when he used word "would" when he meant "wouldn't" in relation to Russian meddling in the USA elections.
He added: "That the man whose arse you've just been kissing did this, and continues to lie about it, is an irrefutable fact".
"It's not anger that I feel towards the two of you, it's something much, much worse", he wrote.
"You have no empathy for your fellow men, and you clearly have no idea what love is", he said.
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Also joining the series in a returning role is Sharon D Clarke. "I don't think I've laughed so much as I have doing this". The Doctor's face, gender and friends aren't the only thing that's new either.
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Because I put my name down with Dustin (Johnson) on Monday, got brushed, and I put my name down with Rory (McIlroy ), got brushed. Fortunately, his clubs turned up after a delay when they were lost by the airline.
The Maslin family. Mum Rin and dad Anthony.
"The trauma of a loss so cataclysmic that it singled us out of all Australians, and made us different".
"When I close my eyes, I can see their smiles", she said.
The final line of her post pointed to sentiments similar to those held by her husband.
"So you have nothing", he said.
With yesterday marking four years since the tragedy, Foreign Minister Julie Bishop says Australia will continue to seek justice for the MH17 victims and will keep pushing.
Joined by the EU's high representative for foreign affairs, Federica Mogherini, the G7 ministers called on Russian Federation to "immediately engage with Australia and the Netherlands in good faith to explain and to address all relevant questions regarding any potential breaches of global law".
The ceremony was organised by the victims' families at a memorial opened a year ago near Schiphol airport, close to Amsterdam.