Meanwhile, Kate's apparent suicide "wasn't unexpected" by her older sister, Reta Saffo, who claimed her sibling had been suffering from mental illness for some time. Picture: Bang Showbiz

New York — Fashion designer Kate Spade's suicide note was addressed to her 13-year-old daughter in which she reportedly wrote "This is not your fault. Ask Daddy".

The note was found on a bed near her body, reported tmz.com. According to law enforcement sources, it read: "Bea - I have always loved you. This is not your fault. Ask Daddy (Andy Spade)!" 

Their daughter's full name is Frances Beatrix.

Law enforcement sources also told tmz.com that Kate was extremely depressed in her last days of life because her husband wanted a divorce. The couple married in 1994.

Read: Kate Spade's husband: She battled depression and anxiety

The 55-year-old fashion designer was found dead in her apartment in New York earlier this week in an apparent suicide and, although her passing came as a shock to many, her friends had started to realise something wasn't quite right beforehand. 

A source told 'Entertainment Tonight': "Kate definitely seemed to distance herself recently and her family was worried about her. 

Meanwhile, Kate's apparent suicide "wasn't unexpected" by her older sister, Reta Saffo, who claimed her sibling had been suffering from mental illness for some time.

Also read: Kate Spade's apparent suicide didn't shock her sister

Reta claimed to have tried for a long time to persuade Kate to seek help but her sister was concerned hospitalisation could harm the image of her "happy-go-lucky" eponymous fashion brand.