Both standards
Do not tumble dry
No tumble dryer.
Usually about heat rather than tumbling: wool felts, elastane goes slack and prints lift. Look for a natural-drying symbol beside it for what to do instead.
Where it sits on the label
- Washing
- Bleaching
- Drying
- Ironing
- Professional care
Drying comes third of the five. A label is always written in this order and simply leaves out whatever does not apply, so a tag carrying only three symbols is not missing anything. The next shape along yours is the next of these its maker had something to say about.
The rest of the square