Ariel Winter's mother Chrystal Workman won't get the chance to reunite with her daughter ... at least for the foreseeable future, TMZ has learned.
Chrystal filed docs recently asking to get her daughter back -- after the court stripped her of custody last year -- but the judge in the case refused ... extending the temporary guardianship of Ariel's older sister Shanelle instead.
You'll recall, Shanelle has been Ariel's guardian since last year, when Chrystal lost custody over allegations that she was emotionally abusive to the 15-year-old "Modern Family" actress.
According to the new court order, Chrystal "presented no evidence that there were any changes or repair of damage to their relationship" -- which has completely fallen apart -- so the judge shot her down.
As we reported, Ariel wants nothing to do with Chrystal whatsoever, and says she loves being with her sister.
Per the order, Ariel will stay under Shanelle's guardianship ... at least pending the outcome of Chrystal's custody trial in September.