Memo for myself, if I need make this again in the future…
On first computer I set sync directory to iCloud. First create new directory on iCloud, then move my Sublime Text 3 settings and preferences into it and then link this local destination to my iCloud folder.
# make new directory on iCloud
mkdir ~/Library/Mobile\ Documents/com~apple~CloudDocs/Sync/Sublime\ Text\
# get in application preferences folder
cd ~/Library/Application\ Support/Sublime\ Text\ 3/
# move User data for syncing do iCloud
mv Installed\ Packages/User/ ~/Library/Mobile\ Documents/com~apple~CloudDocs/Sync/Sublime\ Text\
# link this directory on iCloud to the app directory
ln -s ~/Library/Mobile\ Documents/com~apple~CloudDocs/Sync/Sublime\ Text/User
On my other computers I used this commands. Go into Sublime Text 3 Packages directory, remove old User directory and then link it to synced folder.
# get in application preferences folder
cd ~/Library/Application\ Support/Sublime\ Text\ 3/Packages/
# remove folder User
rm -r User
# link to User folder on iCloud
ln -s ~/Library/Mobile\ Documents/com~apple~CloudDocs/Sync/Sublime\ Text/User