UPDATE: The family of Sandrine Jourdan will host a 'Circle of Friends' at Centenary Lakes, Caboolture on Sunday from 11am.
All are welcome to attend, meet the family and join in a drum session for Sandrine, who is passionate about music.
The 37-year-old single mum of three was last seen on Friday, July 13 leaving a residence on Tomlinson Rd.
Sandrine's sister Christine Jourdan said the family wanted to host a public gathering to make the community aware that she was still missing.
"We want to let everyone know that we are still no closer to finding her and to ask people to come forward with information," Christine said.
"Someone has to know something."
When Sandrine failed to contact her daughter on her birthday on Monday (September 3), Christine said she knew something was wrong.
"I don't believe Sandrine has just walked off. For her not to contact her daughter on her birthday doesn't look good," she said.
"At this stage we don't know what has happened."
Sandrine's family have created a Facebook group to help with search efforts which has gained almost 2000 followers. It can be found here.
Anyone with information in regards to Sandrine Jourdan is urged to contact crime stoppers on 1800 333 000 or contact the family via their facebook page 'Missing Sandrine Jourdan.' The smallest piece of information can help.
AUGUST 14: IT has been one month since Sandrine Jourdan vanished without a trace but her family remain hopeful that their loved one will come home soon.
The 37-year-old single mum of three was last seen on Friday, July 13 after her mum Sylvia dropped her off at a friend's place so they could travel together to a Buddhist retreat on the Gold Coast.
"She wanted to find herself and get her life back on track but she never went to the retreat," Sylvia said.
Sandrine was last seen leaving a residence on Tomlinson Rd, Caboolture later that day.
She has not made contact with friends, family or police since.
By Monday (July 16) Sandrine's family knew something wasn't right and her brother Phillip, reported her missing to police.
"She always had the support of friends and family, originally we thought she would have been at a friend's house somewhere," he said.
Eight days after she went missing on July 21, Queensland Police Service notified the public of Ms Jourdan's disappearance.
Almost instantly members of the public posted questions on the QPS Facebook asking why the disappearance wasn't made public sooner.
However a police social media spokesman said that it was up to investigators as to what point, if any, they went public with missing persons cases.
"With a lot of missing persons cases the people involved are not necessarily missing and simply do not wish to be found," the spokesman said.
Since then police and SES have conducted searches of bushland surrounding Tomlinson Rd and appealed to the public for information without success.
The family has also put in hours of searching, travelling as far as Rainbow Beach to put up signs pleading for information.
"As a family we've made so many phone calls, driven everywhere we think she might be and have remained in touch with her friends in hopes of finding something," Sandrine's sister Christine said.
"We just want her to know we love her and want her to come home."
Christine described Sandrine as a caring, free spirit who loved art and music and had a passion for the outdoors.
"When Sandrine went missing, someone asked us to show a picture of Sandrine not smiling, I thought to myself that's not Sandrine, she was always smiling," Christine said.
"She is a genuinely friendly person who would do anything for anyone, she has a great heart," her Aunt Nardia said.
The family believe Sandrine's disappearance is highly out of character.
"Sandrine plans everything, she is normally very organised and everything had to be pre-planned," Christine said.
"It's not like her to walk off and not contact us and there is no way she would not contact her children, she usually would contact them at least twice a week."
On the day of her disappearance Ms Jourdan was seen wearing a light mauve, long-sleeved jumper and dark dress pants.
She was described as being Caucasian in appearance, about 164cm tall with a proportionate build and has brown hair, brown eyes and speaks fluent French, German and English.
The family have urged the public to come forward with information.
"We can't put together the pieces of the puzzle without public help," Nardia said.
Sandrine's family have created a Facebook group to help with search efforts. It can be found here.
Have you seen Sandrine?
Anyone with information to assist police with their investigations should contact Crime Stoppers, anonymously if necessary, on 1800333000 or crimestoppers.com.au.