Ms Wallace said she had spoken to her daughter on Friday afternoon, who had been excited about an upcoming trip where she would join her in Paris.
Kirsty's family says she was a free spirit who dreamed of travelling to as many "exotic locations as possible". Melissa McMullan said authorities would not be able to formally identify him until a coroner's report was released.
Alexandre Pigeard, 27, has been named by French media as one of those killed.
Brisbane woman Sara Zelenak was killed after walking on London Bridge.
He said he believed a brawl was breaking out when "all of a sudden a guy comes up with a knife. stabs me there (motioning to his neck) I push him off and blood is going everywhere".
Originally from Angers, western France, Mr Belanger had lived in London for several years and reportedly worked at the Coq d'Argent restaurant in the City.
The heroic man almost slipped on the wet London pavement as the terrorist pursued him but he then abruptly stopped and returned back towards Borough Market.
Transport for London, which oversees the capital's transport network, has advised commuters, struggling to get to work in the driving rain, to make alternative journeys as the station will be busy.
A community is rallying around the family of an Australian woman missing in London.
Brave Australian nurse Kirsty Boden was killed by terrorists as she ran towards danger in an effort to help people, her family have said.
Fears had been growing for 21-year-old Sara who had not been seen since being separated from a friend as she tried to flee the terror attack.
London's Metropolitan Police issued a statement from the family of 28-year-old Kirsty Boden praising her compassion and natural instinct to help. "We are so proud of Kirsty's courageous actions which demonstrate how selfless, caring and heroic she was".
Mr Morrison is on his way home and due to land on Tuesday after receiving stitches for a stab wound he received while leaving a bar after watching the Champions League soccer final.
Australian nurse Kirsty Boden, 28, was also confirmed dead after the terrorist attack.
Sharing a video of his daughter online, her father Mark Wallace wrote: "I really miss that amusing little laugh". "Thank-you for all the overwhelming love & support from everyone", she wrote in a moving post on Facebook.
"Sara Zelenak is confirmed dead, they found her body & has DNA tests confirmed".
The son's employer, HSBC, has provided the services of a private detective to aide in the hunt for information.
She insisted that the family would not be drawn into hatred by the atrocity. "He is in heaven with his inseparable skateboard".
"We all know someone who could have been innocently wandering through London last weekend", he said.
Delcros remains seriously injured in hospital and there are concerns Thomas may have been struck by the van and hurled into the Thames.
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