linux - Clonezilla partitions restoring

I have to clone a linux drive to a smaller destination disk. By default Clonezilla will not let me do this.

This is how things look like now:
Source system:
/dev/sda1 72G 10G 58G 15% /
udev 7.9G 4.0K 7.9G 1% /dev
tmpfs 3.2G 332K 3.2G 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 7.9G 0 7.9G 0% /run/shm

Destination system:
/dev/sda3 912G 49G 817G 6% /
udev 7.9G 4.0K 7.9G 1% /dev
tmpfs 3.2G 332K 3.2G 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 7.9G 0 7.9G 0% /run/shm
/dev/sda2 90M 24M 61M 29% /boot
/dev/sda6 1.9G 35M 1.8G 2% /tmp

The partition has a linux unstallation on it .Source drive is 3TB, destination drive is 1TB.

Therefore what I am going to do is to clone the partition sda1 from the source drive, and then restore it on the smaller disk in place of partition sda3.
What bothers me is , if I do it this way, will the restored system work normally and will it, for example start using /tmp the way it is used on the source system (eg., not using the odd 2GB tmp partition that it uses now) ? Will i need to edit /etc/fstab or the GRUB menu?

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