Nick Carter reportedly missed his sister Leslie's funeral on February 5 because of a strained relationship he has with his family.
The pop singer, known as a member of the Backstreet Boys, told E! News in a statement on February 6, "I wanted to be at my sister's funeral, but my family has always had a complicated dynamic."
"I love my family. I want to thank everyone for all of their compassion and support that I have received during this most difficult time," he added.
It is unclear if Carter was aware of the funeral date but he also had professional obligations over the weekend and was performing, according to the report.
Leslie, who took on her husband Mike's last name of Ashton, was just 25 when she died on January 31. She passed away after being found unresponsive at her father and stepmother's home in Mayville in upstate New York.
The incident was dubbed an "overdose" in the police report by the Chautauqua County Sheriff's Office, which also said the local coroner's office plans to carry out a full autopsy to determine what led to the death.
In 2006, Leslie Carter appeared in the E! Entertainment Television reality series, "House of Carters" with her brother Nick, who turned 32 on January 28; her brother Aaron and his twin sister Angel, 24, and her sister Bobbie Jean, 30. The show aired for one season.
Nick Carter, who once battled a 10-year-long addiction to alcohol and drugs such as cocaine, wrote on his Facebook page after the news broke, "Performing is cathartic to me. I am dedicating the rest of my tour to my sister since she loved to watch me perform."
His brother, Aaron Carter, who underwent rehab for one month in 2011 to treat "emotional and spiritual issues, responded to news about her death on his Twitter page on Wednesday, saying: " #broken #distraught #pain #confusion #disbelief #agony #Anger #lost #Sad #Family #LeslieCarter #empty #Leslie #dazed #Heaven #Sister."
Nick Carter released his second solo album "I'm Taking Off" in May 2011. He is also set to join the Backstreet Boys when the all-male group tours the United Kingdom and Ireland in April.