Clarence House said second-in-line to the throne William was left concerned and angry by "threatening behaviour".
It came at a time when William had rekindled his relationship with Kate after a brief split and the pair were said to have been more in love than ever.
Some of this has been very public - the smear on the front page of a national newspaper; the racial undertones of comment pieces; and the outright sexism and racism of social media trolls and web article comments.
Some of it has been hidden from the public - the nightly legal battles to keep defamatory stories out of papers; her mother having to struggle past photographers in order to get to her front door; the attempts of reporters and photographers to gain illegal entry to her home and the calls to police that followed; the substantial bribes offered by papers to her ex-boyfriend; the bombardment of nearly every friend, co-worker, and loved one in her life.‘Prince Harry is worried about Ms Markle's safety and is deeply disappointed that he has not been able to protect her.
Concerns: In an extraordinary statement on his love life, Prince Harry, 32, said he is worried about Meghan Markle's safety following the 'wave of abuse and harassment' she has faced since rumours of their relationship first surfaced nine days ago In the public eye: Harry's new girlfriend Miss Markle is pictured leaving her home in Toronto in Canada last Thursday, which police and private security are now guarding.In an extraordinary statement on his love life, Harry, 32, said he is 'worried about Ms Markle's safety' following the 'wave of abuse and harassment' she has faced since rumours of their relationship first surfaced nine days ago.He lashed out at media intrusion and the 'sexism and racism of social media trolls' in a statement which said 'this is not a game - it is her life and his' and that he is 'deeply disappointed that he has not been able to protect her'.Previously, the actress has revealed her concern about the number of Suits sex scenes she has starred in and says she avoids skimpy clothes because her mother warned her to 'never give the milk away for free'.There has been discussion over Harry marrying a divorcee, with the prejudice against royal love interests famously rearing its head in the abdication crisis of 1936 involving Edward VIII and Wallis Simpson.