left to your own devices

be left to (one's) own devices

To be left unsupervised or uncontrolled; to be allowed to do as one pleases. My job is really great: I know what I need to work on and am just left to my own devices. If left to their own devices, children will get into all sorts of mischief!
See also: device, left, own
Farlex Dictionary of Idioms.

left to your own devices

COMMON If someone is left to their own devices, they are left to do what they want, or to look after themselves without any help. If left to my own devices, I would eat a chocolate dessert every night. After tea we were left to our own devices, so we decided to take a walk in the neighbouring village. The millions of Americans who do not have health insurance are often left to their own devices when they become ill. Note: An old meaning of `device' was desire or will.
See also: device, left, own
Collins COBUILD Idioms Dictionary, 3rd ed.
See also:
  • be left to (one's) own devices
  • be left to (one's) own resources
  • device
  • resource
  • left and right
  • leftleft
  • lurch
  • be left in the lurch
  • left one's calling card
  • from left field
References in periodicals archive
But it's funny what happens when left to your own devices.
off used at and I'm I was isolated in my house but it's funny what happens when left to your own devices
You're transported to the snow-capped peaks of the titular region and are left to your own devices to explore the dragonplagued land in front of you.
Left to your own devices you can discard one of these on a club, after you have drawn trumps and conceded the king of clubs.
Left to your own devices you would lead a spade, partner's suit, West knows this so a double must say do not lead a spade.