--- contrib/python/botocore/py3/botocore/data/s3/2006-03-01/service-2.json	(5718cbe7c8ad633beee9e1eac79e295dea4b8966)
+++ contrib/python/botocore/py3/botocore/data/s3/2006-03-01/service-2.json	(0f7e89156b6ce9f3947ef47273baefe09dd0c1ad)
@@ -1233,6 +1246,21 @@
         "requestChecksumRequired":false
       }
     },
+    "PatchObject":{
+      "name":"PatchObject",
+      "http":{
+        "method":"PATCH",
+        "requestUri":"/{Bucket}/{Key+}"
+      },
+      "input":{"shape":"PatchObjectRequest"},
+      "output":{"shape":"PatchObjectOutput"},
+      "documentationUrl":"",
+      "documentation":"",
+      "httpChecksum":{
+        "requestAlgorithmMember":"ChecksumAlgorithm",
+        "requestChecksumRequired":false
+      }
+    },
     "PutObjectAcl":{
       "name":"PutObjectAcl",
       "http":{
@@ -9501,6 +9627,76 @@
       },
       "payload":"Body"
     },
+    "PatchAppendPartSize":{"type": "integer"},
+    "PatchedObjectInfo":{
+      "type":"structure",
+      "members":{
+        "ETag":{"shape":"ETag"},
+        "LastModified":{"shape":"LastModified"}
+      }
+    },
+    "PatchObjectOutput":{
+      "type":"structure",
+      "members":{
+        "Object":{"shape":"PatchedObjectInfo"}
+      }
+    },
+    "PatchObjectRequest":{
+      "type":"structure",
+      "required":[
+        "Bucket",
+        "Key",
+        "ContentRange"
+      ],
+      "members":{
+        "Body":{
+          "shape":"Body",
+          "streaming":true
+        },
+        "Bucket":{
+          "shape":"BucketName",
+          "contextParam":{"name":"Bucket"},
+          "location":"uri",
+          "locationName":"Bucket"
+        },
+        "ContentLength":{
+          "shape":"ContentLength",
+          "location":"header",
+          "locationName":"Content-Length"
+        },
+        "ContentMD5":{
+          "shape":"ContentMD5",
+          "location":"header",
+          "locationName":"Content-MD5"
+        },
+        "ContentRange":{
+          "shape":"ContentRange",
+          "location":"header",
+          "locationName":"Content-Range"
+        },
+        "IfMatch":{
+          "shape":"IfMatch",
+          "location":"header",
+          "locationName":"If-Match"
+        },
+        "IfUnmodifiedSince":{
+          "shape":"IfUnmodifiedSince",
+          "location":"header",
+          "locationName":"If-Unmodified-Since"
+        },
+        "Key":{
+          "shape":"ObjectKey",
+          "location":"uri",
+          "locationName":"Key"
+        },
+        "PatchAppendPartSize":{
+          "shape":"PatchAppendPartSize",
+          "location":"header",
+          "locationName":"X-Yc-S3-Patch-Append-Part-Size"
+        }
+      },
+      "payload":"Body"
+    },
     "PutObjectRetentionOutput":{
       "type":"structure",
       "members":{
--- contrib/python/botocore/py3/botocore/handlers.py	(5718cbe7c8ad633beee9e1eac79e295dea4b8966)
+++ contrib/python/botocore/py3/botocore/handlers.py	(0f7e89156b6ce9f3947ef47273baefe09dd0c1ad)
@@ -1173,6 +1194,11 @@ BUILTIN_HANDLERS = [
         convert_body_to_file_like_object,
         REGISTER_LAST,
     ),
+    (
+        'before-parameter-build.s3.PatchObject',
+        convert_body_to_file_like_object,
+        REGISTER_LAST,
+    ),
     ('creating-client-class', add_generate_presigned_url),
     ('creating-client-class.s3', add_generate_presigned_post),
     ('creating-client-class.iot-data', check_openssl_supports_tls_version_1_2),
@@ -1213,6 +1239,7 @@ BUILTIN_HANDLERS = [
     ('before-call.glacier', add_glacier_version),
     ('before-call.apigateway', add_accept_header),
     ('before-call.s3.PutObject', conditionally_calculate_checksum),
+    ('before-call.s3.PatchObject', conditionally_calculate_md5),
     ('before-call.s3.UploadPart', conditionally_calculate_md5),
     ('before-call.s3.DeleteObjects', escape_xml_payload),
     ('before-call.s3.DeleteObjects', conditionally_calculate_checksum),
@@ -1242,6 +1269,7 @@ BUILTIN_HANDLERS = [
     ('before-parameter-build.s3.HeadObject', sse_md5),
     ('before-parameter-build.s3.GetObject', sse_md5),
     ('before-parameter-build.s3.PutObject', sse_md5),
+    ('before-parameter-build.s3.PatchObject', sse_md5),
     ('before-parameter-build.s3.CopyObject', sse_md5),
     ('before-parameter-build.s3.CopyObject', copy_source_sse_md5),
     ('before-parameter-build.s3.CreateMultipartUpload', sse_md5),