The dexamethasone 700 μg intravitreal implant (DEX-I) delivers dexamethasone gradually to the retina over time. It is an approved drug for the treatment of DME. This study will assess adult participants with diabetic macular edema (DME) and suboptimal response to anti-vascular endothelial growth factor therapy that are treated with DEX-I in the routine clinical setting. Approximately 327 participants who are prescribed DEX-I by their physicians will be enrolled at approximately 40 sites in approximately 10 countries globally. Participants will be followed for 18 months post-DEX-I implantation according to the routine clinical practice of the prescribing centers. Only one eye per participant will be evaluated in the study. No additional burden for participants in this trial is expected.