Azure 3-Tier Kubernetes Application implements a cloud-native architecture using AKS with three deployment tiers: Presentation (Ingress + frontend pods), Application (microservices pods with sidecar proxies), and Data (StatefulSets for persistent storage). The architecture uses Kubernetes-native patterns with declarative configuration, automatic scaling through HPA and Cluster Autoscaler, and service mesh (Istio) for advanced traffic management. Security is implemented through Pod Security Policies, Network Policies, Azure AD integration, and encryption.