diff --git a/src/libraries/Common/src/Interop/Interop.zlib.cs b/src/libraries/Common/src/Interop/Interop.zlib.cs
index ba4326dfed0d94..64114d36b30967 100644
--- a/src/libraries/Common/src/Interop/Interop.zlib.cs
+++ b/src/libraries/Common/src/Interop/Interop.zlib.cs
@@ -20,9 +20,6 @@ internal static unsafe partial ZLibNative.ErrorCode DeflateInit2_(
         [LibraryImport(Libraries.CompressionNative, EntryPoint = "CompressionNative_Deflate")]
         internal static unsafe partial ZLibNative.ErrorCode Deflate(ZLibNative.ZStream* stream, ZLibNative.FlushCode flush);
 
-        [LibraryImport(Libraries.CompressionNative, EntryPoint = "CompressionNative_DeflateReset")]
-        internal static unsafe partial ZLibNative.ErrorCode DeflateReset(ZLibNative.ZStream* stream);
-
         [LibraryImport(Libraries.CompressionNative, EntryPoint = "CompressionNative_DeflateEnd")]
         internal static unsafe partial ZLibNative.ErrorCode DeflateEnd(ZLibNative.ZStream* stream);
 
@@ -32,9 +29,6 @@ internal static unsafe partial ZLibNative.ErrorCode DeflateInit2_(
         [LibraryImport(Libraries.CompressionNative, EntryPoint = "CompressionNative_Inflate")]
         internal static unsafe partial ZLibNative.ErrorCode Inflate(ZLibNative.ZStream* stream, ZLibNative.FlushCode flush);
 
-        [LibraryImport(Libraries.CompressionNative, EntryPoint = "CompressionNative_InflateReset")]
-        internal static unsafe partial ZLibNative.ErrorCode InflateReset(ZLibNative.ZStream* stream);
-
         [LibraryImport(Libraries.CompressionNative, EntryPoint = "CompressionNative_InflateEnd")]
         internal static unsafe partial ZLibNative.ErrorCode InflateEnd(ZLibNative.ZStream* stream);
 
diff --git a/src/libraries/Common/src/System/IO/Compression/ZLibNative.cs b/src/libraries/Common/src/System/IO/Compression/ZLibNative.cs
index ad4e9583d880fb..00851ee1048d5e 100644
--- a/src/libraries/Common/src/System/IO/Compression/ZLibNative.cs
+++ b/src/libraries/Common/src/System/IO/Compression/ZLibNative.cs
@@ -286,17 +286,6 @@ public unsafe ErrorCode Deflate(FlushCode flush)
             }
 
 
-            public unsafe ErrorCode DeflateReset()
-            {
-                EnsureNotDisposed();
-                EnsureState(State.InitializedForDeflate);
-
-                fixed (ZStream* stream = &_zStream)
-                {
-                    return Interop.ZLib.DeflateReset(stream);
-                }
-            }
-
             public unsafe ErrorCode DeflateEnd()
             {
                 EnsureNotDisposed();
@@ -339,17 +328,6 @@ public unsafe ErrorCode Inflate(FlushCode flush)
             }
 
 
-            public unsafe ErrorCode InflateReset()
-            {
-                EnsureNotDisposed();
-                EnsureState(State.InitializedForInflate);
-
-                fixed (ZStream* stream = &_zStream)
-                {
-                    return Interop.ZLib.InflateReset(stream);
-                }
-            }
-
             public unsafe ErrorCode InflateEnd()
             {
                 EnsureNotDisposed();
diff --git a/src/native/libs/System.IO.Compression.Native/System.IO.Compression.Native.def b/src/native/libs/System.IO.Compression.Native/System.IO.Compression.Native.def
index aecd0dd974618a..6821d0e538f51f 100644
--- a/src/native/libs/System.IO.Compression.Native/System.IO.Compression.Native.def
+++ b/src/native/libs/System.IO.Compression.Native/System.IO.Compression.Native.def
@@ -15,9 +15,7 @@ EXPORTS
     CompressionNative_Crc32
     CompressionNative_Deflate
     CompressionNative_DeflateEnd
-    CompressionNative_DeflateReset
     CompressionNative_DeflateInit2_
     CompressionNative_Inflate
     CompressionNative_InflateEnd
-    CompressionNative_InflateReset
     CompressionNative_InflateInit2_
diff --git a/src/native/libs/System.IO.Compression.Native/System.IO.Compression.Native_unixexports.src b/src/native/libs/System.IO.Compression.Native/System.IO.Compression.Native_unixexports.src
index 2ac827035f271b..08dd1700a52f21 100644
--- a/src/native/libs/System.IO.Compression.Native/System.IO.Compression.Native_unixexports.src
+++ b/src/native/libs/System.IO.Compression.Native/System.IO.Compression.Native_unixexports.src
@@ -15,9 +15,7 @@ BrotliEncoderSetParameter
 CompressionNative_Crc32
 CompressionNative_Deflate
 CompressionNative_DeflateEnd
-CompressionNative_DeflateReset
 CompressionNative_DeflateInit2_
 CompressionNative_Inflate
 CompressionNative_InflateEnd
-CompressionNative_InflateReset
 CompressionNative_InflateInit2_
diff --git a/src/native/libs/System.IO.Compression.Native/entrypoints.c b/src/native/libs/System.IO.Compression.Native/entrypoints.c
index 6b6cc64ad0d3bd..05a8c228eb785b 100644
--- a/src/native/libs/System.IO.Compression.Native/entrypoints.c
+++ b/src/native/libs/System.IO.Compression.Native/entrypoints.c
@@ -26,11 +26,9 @@ static const Entry s_compressionNative[] =
     DllImportEntry(CompressionNative_Crc32)
     DllImportEntry(CompressionNative_Deflate)
     DllImportEntry(CompressionNative_DeflateEnd)
-    DllImportEntry(CompressionNative_DeflateReset)
     DllImportEntry(CompressionNative_DeflateInit2_)
     DllImportEntry(CompressionNative_Inflate)
     DllImportEntry(CompressionNative_InflateEnd)
-    DllImportEntry(CompressionNative_InflateReset)
     DllImportEntry(CompressionNative_InflateInit2_)
 };
 
diff --git a/src/native/libs/System.IO.Compression.Native/pal_zlib.c b/src/native/libs/System.IO.Compression.Native/pal_zlib.c
index f5d25d66106b02..fce7e2d43f760c 100644
--- a/src/native/libs/System.IO.Compression.Native/pal_zlib.c
+++ b/src/native/libs/System.IO.Compression.Native/pal_zlib.c
@@ -137,17 +137,6 @@ int32_t CompressionNative_Deflate(PAL_ZStream* stream, int32_t flush)
     return result;
 }
 
-int32_t CompressionNative_DeflateReset(PAL_ZStream* stream)
-{
-    assert(stream != NULL);
-
-    z_stream* zStream = GetCurrentZStream(stream);
-    int32_t result = deflateReset(zStream);
-    TransferStateToPalZStream(zStream, stream);
-
-    return result;
-}
-
 int32_t CompressionNative_DeflateEnd(PAL_ZStream* stream)
 {
     assert(stream != NULL);
@@ -185,17 +174,6 @@ int32_t CompressionNative_Inflate(PAL_ZStream* stream, int32_t flush)
     return result;
 }
 
-int32_t CompressionNative_InflateReset(PAL_ZStream* stream)
-{
-    assert(stream != NULL);
-
-    z_stream* zStream = GetCurrentZStream(stream);
-    int32_t result = inflateReset(zStream);
-    TransferStateToPalZStream(zStream, stream);
-
-    return result;
-}
-
 int32_t CompressionNative_InflateEnd(PAL_ZStream* stream)
 {
     assert(stream != NULL);
diff --git a/src/native/libs/System.IO.Compression.Native/pal_zlib.h b/src/native/libs/System.IO.Compression.Native/pal_zlib.h
index fc2f2107ee8ca4..b317091b843f62 100644
--- a/src/native/libs/System.IO.Compression.Native/pal_zlib.h
+++ b/src/native/libs/System.IO.Compression.Native/pal_zlib.h
@@ -95,14 +95,6 @@ Returns a PAL_ErrorCode indicating success or an error number on failure.
 */
 FUNCTIONEXPORT int32_t FUNCTIONCALLINGCONVENCTION CompressionNative_Deflate(PAL_ZStream* stream, int32_t flush);
 
-/*
-This function is equivalent to DeflateEnd followed by DeflateInit, but does not free and reallocate
-the internal compression state. The stream will leave the compression level and any other attributes that may have been set unchanged.
-
-Returns a PAL_ErrorCode indicating success or an error number on failure.
-*/
-FUNCTIONEXPORT int32_t FUNCTIONCALLINGCONVENCTION CompressionNative_DeflateReset(PAL_ZStream* stream);
-
 /*
 All dynamically allocated data structures for this stream are freed.
 
@@ -125,14 +117,6 @@ Returns a PAL_ErrorCode indicating success or an error number on failure.
 */
 FUNCTIONEXPORT int32_t FUNCTIONCALLINGCONVENCTION CompressionNative_Inflate(PAL_ZStream* stream, int32_t flush);
 
-/*
-This function is equivalent to InflateEnd followed by InflateInit, but does not free and reallocate
-the internal decompression state. The stream will keep attributes that may have been set by InflateInit.
-
-Returns a PAL_ErrorCode indicating success or an error number on failure.
-*/
-FUNCTIONEXPORT int32_t FUNCTIONCALLINGCONVENCTION CompressionNative_InflateReset(PAL_ZStream* stream);
-
 /*
 All dynamically allocated data structures for this stream are freed.