How can my asymmetrical nasolabial fold be corrected? When I smile it appears to pull further. (Photo)

Your nasolabial fold is slightly longer on one side and almost confluences with the marionette line on the one side.
A smile is a dynamic feature and thus in most cases we some degree of asymmetry in everyone.
Most smile lines cannot be changed as they are a dynamic feature.
This is part of your uniqueness - don't try change it.

Thank you for your question.
Certainly, it is not unusual for our nasolabial folds to be asymmetric when we
smile. However, ideally, we all like to be as symmetric as possible. It would
be important to know if you have any asymmetry between your nasolabial folds in
a resting position. If so, injectable fillers might be able to assist in
improving the asymmetry both at rest and during expression. However, if there
is no asymmetry at rest, then the problem is most likely related to overactive
muscular activity on the right side. One could consider trying to improve the
asymmetry using neural modulators like Botox or Dysport. Certainly, it would
require a consultation with careful physical examination before I could give
specific recommendations. I hope this helps.