Both standards
Do not iron
No ironing at all.
Expect irreversible changes if you do: a permanent shine, a flattened pile, or a print that lifts onto the soleplate.
Where it sits on the label
- Washing
- Bleaching
- Drying
- Ironing
- Professional care
Ironing comes fourth 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 iron