diff --git a/docs/IE_DG/API_Changes.md b/docs/IE_DG/API_Changes.md
index c23c427e6edf38..f379d6d57909ef 100644
--- a/docs/IE_DG/API_Changes.md
+++ b/docs/IE_DG/API_Changes.md
@@ -2,6 +2,19 @@
 
 The sections below contain detailed list of changes made to the Inference Engine API in recent releases.
 
+## 2021.3
+
+### New API
+
+ * InferenceEngine::InferRequest::Cancel to cancel inference request execution
+ * InferenceEngine::Layout::HWC to support HWC layout for input or output blobs
+ * InferenceEngine::Precision::F64 data precision for f64 data type
+ * InferenceEngine::CNNNetwork::getOVNameForTensor to map frameworks tensor names to OpenVINO internal tensor names
+
+### Deprecated API
+
+ * InferenceEngine::IVariableState interface is deprecated, use InferenceEngine::VariableState wrapper
+
 ## 2021.2
 
 ### New API
diff --git a/inference-engine/include/ie_core.hpp b/inference-engine/include/ie_core.hpp
index 41046a2087bfd4..c5197f0a41cf01 100644
--- a/inference-engine/include/ie_core.hpp
+++ b/inference-engine/include/ie_core.hpp
@@ -85,6 +85,9 @@ class INFERENCE_ENGINE_API_CLASS(Core) {
      * `InferenceEngine::Core::ReadNetwork(const std::string& model, const Blob::CPtr& weights) const`
      * function overload which takes a filesystem path to the model.
      * For ONNX case the second parameter should contain empty blob.
+     * @note Created InferenceEngine::CNNNetwork object shares the weights with `weights` object.
+     * So, do not create `weights` on temporary data which can be later freed, since the network
+     * constant datas become to point to invalid memory.
      * @return CNNNetwork
      */
     CNNNetwork ReadNetwork(const std::string& model, const Blob::CPtr& weights) const;