Three year anniversaries are a special and significant milestone in a couple's relationship, and there are many great gift ideas that can show your love and appreciation for your partner on this special occasion. Some popular options could include a sentimental and heartfelt card or note, a collection of photos or memories from your first three years together, or a book or DVD about relationships and love. For the partner who loves to be pampered and spoiled, you could also consider a gift card to a favorite store or online retailer, a gift certificate for a special activity or experience, or a set of luxurious and indulgent bath and body products. Other ideas could include a relationship-themed board game or puzzle, a relationship-themed coffee mug or water bottle, or a collection of relationship-themed movies or TV shows. Ultimately, the best gift will depend on your partner's interests and personal style, as well as your relationship and connection to them as a couple.