A British Columbia court asked Malkit Sidhu, 65, and her brother Surjit Badesha, 69, last month to surrender after the police found enough evidence against the two to face trial, Vancouver Desi reported.
Jaswinder Sidhu was kidnapped by a group of men June 8, 2000, while on visit in Punjab.
The 25-year-old was found dead the next day in a canal, her throat slit.
Sidhu's husband, Sukhwinder Sidhu, was severely injured but survived in the same attack.
The judge said that evidence against Mlkit and Badesh included the fact that Malkit felt her daughter had dishonoured the family by marrying someone the family was opposed to.
Neither Malkit nor Badesha made any funeral arrangements for Jaswinder, inquired after her body or attended her funeral, the judge added.
The sister-brother duo appealed on several grounds that it was inaccurate to find them guilty of the crime.
Malkit and Badesha were arrested Jan 6, 2012, almost 12 years after Jaswinder's body was pulled out of the canal.